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Reader Comment: Apple Feedback Assistant App

Trevor A writes:

I love reading your comments on Apple software - your always spot on. If you don’t know about this, it could prove helpful.

Even on production software, you can still access the Feedback Assistant app to send the stuff directly to Apple. You can send the same stuff as you post in your blogs. Document it in their systems.

To find the Feedback Assistant, just enter the URL applefeedback:// in the browser URL bar - hitting/tapping return will then prompt you to open the app. On the Mac, Spotlight can find the Feedback Assistant app, but this is helpful on iOS where the app is more hidden. The app automates the process of collecting logs and other necessary files from the device.

This may feel like a black hole, but its better then nothing and getting the information logged in their systems is always the best.

MPG: the last time I reported a serious bug to Apple, it wasn’t even evaluated for 6 weeks. I got the message loud and clear.

For those more willing to spend their money on Apple’s behalf (my time is money)—go for it.

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Reader Comment: “Loss of confidence in Apple, what are our options?"

Get 2020 iMac 5K at B&H Photo.

The rapid changes and instability of macOS show Apple’s lack of concern (contempt?) for anyone using a Mac to make their living. Compatibility with software people rely on is clealy a NON priority, and it is particularly damaging to the workflows of pro users, and educational and other institutions, where software goes into “production” and needs to continue to run and run reliably for years.

The foregoing should give pause to many a professional. It is why MPG strongly recommends the “toaster” model: if your computer works, do NOT upgrade macOS to a major new version. Leave it alone and let it toast your bread perfectly until the day it dies.

Andrew V writes:

So what are our options?

Although I am not a “Pro” user by most definitions, I still want a machine that can:

1) Handle the wide range of activities from business applications as such accounting and tax (which is run Windows 10 using VMWare Fusion) to hobbies (amateur photography/video) and entertainment center to run my large uncompressed music/video collection.

2) Run flawlessly for 5-7+ years (like my previous 2009 and now 2013 Mac Pro).

3) Somewhat future proof in terms of specs whether upgradable or not - again the 5-7 year mark.

4) Operate a well constructed/designed and useful operating system (unfortunately this has been like a slow death march since 2006 with my first iMac).

5) Keep the cost reasonably down. Why does a module system have to start at $6000 even before adding the monitor? (I don’t count the Mac Mini as being a true module system) The starting price is an enormous leap from the 2013 Mac Pro line.  I bet the desktop case alone adds $2000 to its cost; they are asking $400 for matching wheels and $999 for the monitor pro stand.

My main concern/fear is applicable to either spectrum: 

A) Buying an existing Intel based Mac computer only to have Adobe/Microsoft stop software upgrades in favor of the ARM based Macs.

B) The ARM based Mac will most likely have even more issues both hardware and operating system and upgrading all of my software will be an added expense and untested experience. 

Waiting too long to make that decision will leave me with only the ARM based Macs.

I have lost my confidence with Apple.  They seem to believe that it's the hardware that is most important to the user (thinner, lighter, sleeker, etc..) and the more they focus on that the more individuals will believe it too.  For me, it has always been the operating system, the smooth integration between products, it just worked; at least it did several versions ago.  

So what are we getting now?  Hardware with issues (16” MacBook Pro) and software that is more concerned with emojis than actual working use. A bad and ever growing sign of the future.

Maybe the Mac Mini is the way to go for now and see what the future brings……  At least if it all goes south, I will limit my losses and the add-on parts (monitor, external drives) can be reused with a (gasp) Windows machine. 

Just trying to figure out what to do.

MPG: I’m trying to figure it out too.

At this point I have a Mac Pro and though I’ve partially rejected the 2020 iMac 5K, I might buy one simply because I want the best of the known while I can, before we are forced into an unwanted macOS Big Sneer and new hardware that likely will underperform for pro users (possibly excepting video) for at least a year or two.

I don’t want the hassle of macOS Crapalina, and I don’t want to waste $600 upgrading my Catalina-incompatible accounting software, but I might resort to Parallels Desktop to deal with that compatibility issue. It’s a question of balancing my priorities.

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Apple 2020 iMac 5K: Might it have Dual Thunderbolt 3 Busses when Configured with Radeon Pro 5700 or Radeon Pro 5700 XT GPU?

Get 2020 iMac 5K at B&H Photo.

More about the 2020 iMac 5K and see yesterday’s overview of the 2020 iMac 5K.

See also:

Jeremi M writes:

I am a video editor that currently works off a maxed out 2019 iMac 5K.

My biggest question about the 2020 iMac update before it came out was if it would add a 2nd Thunderbolt 3 bus as I edit with LG Ultrafine 5K display on top of using a lot of high speed external SSDs via Thunderbolt 3. I'm probably maxing out the current single Thunderbolt 3 bus in my 2019 iMac 5K.

I got excited when I saw that the top 2020 iMac can support "Two 6K external Displays" thinking that they might have added a 2nd Thunderbolt 3 bus. However I couldn't find that specific info anywhere except on your blog.

Was just wondering where you got your info from and how one Thunderbolt 3 bus could support two 6K displays.

Do you think it's possible that by adding the Radeon Pro 5700 card it adds a 2nd Thunderbolt 3 bus? This would be similar to how Mac GPUs that get added into the Mac Pro tower add extra Thunderbolt 3 busses.

MPG: excellent question!

Dual 6K displays exceed the bandwidth of a single Thunderbolt 3 bus. Surely this means that each Thunderbolt 3 ports is on its own Thunderbolt 3 bus?

While never before been implemented on any Mac, dual busses seems the only possible explanation.

Video Support and Camera

1080p FaceTime HD camera
Simultaneously supports full native resolution on the built-in display at 1 billion colors and:

One 6016-by-3384 (6K) external display at 60Hz with support for 1 billion colors, or
Two 6016-by-3384 (6K) external displays at 60Hz with support for 1 billion colors (requires Radeon Pro 5700 or Radeon Pro 5700 XT), or
One 5120‑by‑2880 (5K) external display at 60Hz with support for 1 billion colors, or
Two 3840-by-2160 (4K UHD) external displays at 60Hz with support for 1 billion colors, or
Two 4096‑by‑2304 (4K) external displays at 60Hz with support for millions of colors

Thunderbolt 3 digital video output

Native DisplayPort output over USB‑C
Thunderbolt 2, HDMI, DVI, and VGA output supported using adapters (sold separately)

Reader comments

Michael C writes:

Some more clarification on the new iMac 5K and how the 5700XT model WONT have extra TB3 ports. See this AMD white paper (page 19): https://www.amd.com/system/files/documents/rdna-whitepaper.pdf

Basically the new GPU architecture takes credit for the improved decoding and output improvements:

“The RDNA display engine was majorly re-designed and optimized for 4K and 8K displays and high dynamic range (HDR). The HMDI® output delivers the full 18 Gbps speed of HDMI® 2.0b to enable 4K at 60 Hz or1080P at 240 Hz.
The DisplayPortTM 1.4a connection is the same raw bandwidth, up to 32.4 Gbps over existing cables, but adds Display Stream Compression (DSC), which enables future support of displays up to 8K HDR at 60 Hz and 4K HDR at 240 Hz.”

MPG: DSC video compression might not be acceptable for pro work*, but set that aside.

Also, HDMI is inferior for pro color calibration, at least for still photography.

  • 4K at 240 Hz is 8.8 megapixels is equivalent to 4 X 8.8 = 35.2 megapixels. and requires ~63.6 Gbps for 30-bit RGB color (35.2*3 * 10 *60). -
  • 8K at 7360 X 5120 - 36.7 megapixels and requires 66 Gbps for 30-bit color (36.7 * 3 * 10 * 60).
  • Dual 6K at 6016 * 3384 * 2 is 40.7 megapixels and requires 70.3 Gpbs for 30-bit RGB color (40.7 * 3 * 10 * 60)

How DSC can turn 70.3 Gbps into the 32.4 Gpbs or even 40 Gbps remains a mystery to me. Moreover, there would be no bandwidth left for anything else.

Page 19 of the AMD PDF states:

DSC can compress video without chroma sub-sampling (4:4:4) to as low as 8 bits/pixel for both HDR and SDR.

But... 40.7 megapixels (dual 6K) * 3 * 8 * 60 = 58.6 Gbps, which is still far in excess of Thunderbolt 3 bandwidth.

Unless I am reading it wrong, and it really means “a 3 X 10-bit pixel (30 bits) can be compressed to 8 bits in total”. I have a very hard time believing that is “visually lossless”. But perhaps that is what is going on.

* I have color vision (tested) better than 99.9% of the population (at least when I was 10 years younger), so I don’t buy “visually lossless” but I'll accept it as a "maybe".

Up to 1527MB/s sustained performance

Apple 2020 iMac 5K: Save up to 77.7% with OWC Memory

Get 2020 iMac 5K at B&H Photo.

More about the 2020 iMac 5K and see yesterday’s overview of the 2020 iMac 5K.

Apple wants a +$2600 for 128GB memory in the 2020 iMac 5K. This profit margin would make a Wall Street weasel blush.

Or you can get the 128GB at OWC for $600, a savings of $2000.

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Apple 2020 iMac 5K: some Nice New Options but with Downsides for Pro Users, Too

Get 2020 iMac 5K at B&H Photo.

I’m tempted to get a 2020 iMac 5K, as I still use the 2019 iMac 5K heavily during my travels to places like the Eastern Sierra, Alabama Hills, Mt Dana area, Saddlebag Lake area, White Mountains, etc—4 months straight this sprint during the feckless COVID-19 lockdowns.

The improvements in the 2020 iMac 5K are incremental. But for demanding computing chores like I do, including focus stacking and image scaling and panorama assembly using raw files of images up to 150MB each, the following features are nice advancements:

  • The 10 core CPU option in the 2020 iMac 5K ($400 option over the 8-core CPU) is probably good for at most a ~25% performance boost over the 3.6 GHz Intel Core i9 8-core in my 2019 iMac 5K. Apple claims 65% for some specialized tasks, but the likelihood is a 20% boost at best when all 10 cores are in use, particularly if memory bandwidth is still a hobbled dual-channel design.
  • The 4TB and 8TB SSD options are very welcome, and extend the convenience and longevity of the machine—I’d not buy with anything less than 4TB.
  • Four (4) memory slots—at least that remains (still 4 slots) and they are user-accessible, unlike the ridiculous closed-system iMac Pro. Apple will gladly sell you 128GB for 4-5X the price it costs elsewhere (see below). It’s not clear if the CPU uses quad channel or dual channel memory—probably still dual channel which is a bummer for an 8 or 10 core CPU.
  • The faster GPU option $500 upcharge may be worth it for a few specialized users, but why not just get an iMac Pro?
  • The display is claimed to be improved—yawn. Maybe the +$500 nano texture glass is worth something (maybe $200?). But if it’s like the Apple Pro Display XDR with its consumer-grade color and brightness uniformity issues, then the 2020 iMac 5K is dead on arrival. TBD.
  • The TrueTone technology is a Bad Idea for those working with color as I do—more than once it has ruined my work and I’ve had to redo it. Now I just turn off this DF features which does not recognize simple things like “gee, the user is running a color managed workflow program (Photoshop), maybe the color should not be stomped on?” Apple talks about AI. but cannot get even the simplest basics right?
  • The SD slot is now SDXC UHS-II—should be about twice as fast. Still on the rear of the computer, as asinine as it gets in design terms.
  • Bluetooth 5.0—faster, greater range.
  • The Facetime 1080p camera may be a big win for some, but it’s a loser for me; I tape over (cover) all cameras on my computers for security reasons.
  • 6K display support is a bad joke, see below.


Many users will not find these downsides significant, but the wisdom of spending $5000 or more on a hobbled machine versus an iMac Pro remains to be seen.

Major downsides for professional users like me are so significant that I don’t think I’ll buy one—spending $6000 for a hobbled machine for a marginal speed increase is very poor ROI. And having to deal with Catalina is a problem—it will cost me $600 to “upgrade” my accounting software that runs just fine on macOS Mojave on the 2019 iMac 5K.

  • macOS Crapalina is the worst macOS release in history. I loathe running it due to numerous daily small bugs that waste my time, and these are not likely to ever be fixed. With the 2020 iMac 5K, you’re stuck with Crapalina (unconfirmed, but it’s rare if ever that a new Mac will run a prior operating system version).
  • The Apple T2 chip is now in the 2020 iMac 5K. It is the source of many problems, including “bricking” the computer in some cases. I’d pay EXTRA to omit the T2 chip! However, it may speed up certain types of video encoding substantially, eg HEVC.
  • Still only one Thunderbolt 3 bus with only 2 ports. Is this some cheap sales ploy to force users into an iMac Pro? Even a Mac mini has two busses and 4 ports.
    UPDATE: dual Thunderbolt 3 busses when configured with the better GPUs?
  • You have to pay extra for 10-gigabit ethernet.
  • Supports a 6K display which is all but useless because there is only one Thunderbolt 3 bus, and the 6K display will suck up 75% of the bandwidth, degrading speed (for writes) to USB speed. A hobbled design—how many users will add a 6K display, but not need any high-speed external storage? Better add that 8TB SSD...
  • The 128GB memory option was already there in the 2019 iMac 5K (I’ve been using 128GB for 15 months now!). For Apple to claim this is a new feature is borderline fraud—I’d be OK with it if Apple acknowledged it as purely a sales-game change, because it is not a technical one. And Apple built-to-order 128GB memory is a massive $2600 ripoff versus $599 for 128GB memory for iMac 5K at OWC.
  • Still a lame 4 USB-A ports and no USB-C ports (excluding the inadequate dual Thunderbolt 3 ports, which are USB-C compatible).

Reader Comments

Pascal D writes:

One more downside is that it seems the SSDs are now soldered unlike previous generations. Of course Apple will be happy to sell you larger capacity options at 4-5 times the market price. Talk about mafia-like business practices. The only user upgradeable component left is the memory. It does not look good for the future Apple ARM Macs which I think will be totally not upgradeable.

MPG: a soldered-on SSD is definitely a downside, but I’m not too concerned about it, given products like the OWC Thunderblade.

As for business practices—in our semi-free society, people are free to buy or not to buy what they want (well, not in health care)—but Apple is not exactly garnering goodwill by grossly overcharging, particularly with a pathetic 1-year warranty on a super premium-priced product, which means you have to add on the cost of AppleCare.

Up to 1527MB/s sustained performance

diglloydTools IntegrityChecker Java v2.0 fc4 Available for Download

See data integrity, including recent post Data Loss Prevented: IntegrityChecker Saves my Bacon by Detecting Corrupted Files after a Clone bit rot.

IntegrityChecker java runs on any platform with a JVM. I’m looking for Windows, Linux, and NAS users to test IntegrityChecker java. Contact Lloyd.

A major update to diglloydTools IntegrityChecker is now available. Key things are noted below.

This final candidate (fc) is production-ready, or so I believe. Click through the license and download page to download:

Download IntegrityChecker Java 2.0 fc4

Documentation is largely in place but may fall a bit short in a few areas.

Buy diglloydTools (includes IntegrityChecker Java).


New feature: folder hash hierarchies

Folder hash hierarchies record all hash values for an entire folder hierarchy or volume in a single ".icjh" file. These case can be applied to any folder and can be “nested”, and are intelligently updated. All top level folders specified automatically get their own hierarchy file.

Hierarchy files can also be used in combination with traditional every-folder “.icj” files. This may be useful when rearranging lots of folders, in that the ".icj" file travels with every folder. But for most backups and data verification purposes, the ".icj" files are not superfluous.

For folders like my Apple Mail folder with 113784 folder and growing, that’s one (1) ".icjh" file instead of 113784 ".icj" files which eliminates the need to read/write 113784 ".icjh" files—which is also a bonus for minimizing backup activity. And there is absolutely no value in having those files in each folder, since the mail folder is never rearranged and always backed up in it entirety.
Hash data for 113784 folders containing 387296 files loaded in 12109 ms.

Hierarchy files also mean that one can use icj on ".git" hierarchies without git complaining about unwanted files in its 'objects' and 'pack' folders. Ditto for any program which dislikes unknown files in its folder hierarchy, library, etc.

A folder hash hierarchy also makes it possible to hash read-only media and store that hash file elsewhere. This can be implemented if interest in it is seen.

New feature: in-place update but with full compatibility

IntegrityChecker java maintains full compatibility with prior hash formats, include the native version ".ic" format (SHA1). Backward 'verify' compatibility is essential, since many pros burn their work to read-only media—read-only media cannot be updated or changed.

A revised hash format (chained SHA512) is introduced with the update command automatically verifying the existing hash and computing the new and faster SHA512 hash. In this way, updating is seamless and results in the best possible speed once updated.


Performance is terrific — shown below is icj on a 2.5 GHz 28-core Mac Pro doing 12.5 GB/sec hashing (12500 MB/sec). That’s about 446 MB/sec per real core which are running at a relatively slow 2.5 Ghz each.

File globbing

Not yet implemented but planned soon: file globbing, which will allow precise control of which files are hashed and which are not, folders to be included or excluded, etc.

56 virtual CPU cores in use (28 real cores) — diglloydTools IntegrityChecker doing SHA512 hash at 12.5 GB/sec

Apple iPhone Refuses to Play 90% of My Music and Audiobooks: “song is not currently available in your country or region”

Out of the blue today—first time ever—my iPhone 7 Plus running iOS 13.6 now refuses to play 70% of my legitimately-owned music—200GB or so, with tracks selected for refusal randomly selected eg 3 of 12 tracks on every album can be played, but not the others.

  • The same music plays on the Mac and on my iPhone 6S Plus.
  • Rebooting and re-syncing the iPhone makes no difference. Quitting apps makes no difference
  • NONE of this music has anything to do with ANY online music service.

Reckless and feckless “leadership” by Tim Cook continues to produce manure-grade software with Apple Core Rot is now far beyond outrageous.

UPDATE: looks like a NASTY bug in iOS 13.6 or perhaps Music.app: it is re-syncing 20,000 tracks onto the phone—tracks which were there for the past 3 or 4 years. WTF?

70% of music is non-playable "song is not currently available in your country or region"

Anon writes:

I have exactly the same problem, but worse, even music and podcasts I recorded myself at conferences & church tent meetings can not be played. Total crazy.

MPG: thank you Apple for feckless engineering.

TESTED: OWC Thunderbolt 3 10-Gigabit Ethernet Adapter

Dang! If you’re connecting machines together and you want fast connectivity, this is the real deal!

Get the about $150 OWC Thunderbolt 3 10G Ethernet Adapter at MacSales.com. You might also want some Cat 7 ethernet cables.

WOW—this is one of the most awesome upgrades ever with a huge value proposition. All you need is Thunderbolt 3 Macs (2019 Mac pro already has 10G ethernet built-in)*.

Well, sort of: it’s easy enough to connect two Macs directly together as done for testing here, but with 3 or more Macs you’ll need a 10G ethernet switch like the NETGEAR 10-Port Gigabit/10G Ethernet Unmanaged Switch GS110MX. The bummer is that it’s hard to get three or more 10G ports without high cost—you get into the $2000 range just to get four 10G ports, such as the NETGEAR 28-Port 10G Ethernet Smart Managed Pro Switch XS728T or the NETGEAR 8-Port Smart Managed Plus Switch 10G Ethernet XS708E or the Cisco SG250X-24 Smart Switch with 24 Gigabit Ethernet (GbE) + 4 10 Gigabit Ethernet SFP+ SG250X-24-K9-NA. Or the QNAP QSW-1208-8C-US 12-Port Unmanaged 10GbE Switch.

With this kind of speed, the network actually outperforms most HDD-based RAID systems, certainly any 4-drive RAID. So put those noisy spinners out in the garage connected to any Thunderbolt 3 Mac (think Mac mini set to never sleep), and run an ethernet cable up to 100 meters out there.

OWC Thunderbolt 3 10-Gigabit Ethernet Adapter vs Gigabit Ethernet and WiFi

Feature overview

  • Blazing-fast: over 900MB/s real-world tested transfer speed for large file transfers, video editing, and live streaming gaming sessions
  • Compatible: use with any Thunderbolt 3-equipped Mac or Windows computer
  • Capable: Up to 100-meter cable distance with Cat6a for 10G, Cat6 for 5G, and Cat5e for 2.5G
  • Smart: supports auto-negotiation for 10Gb/s, 5Gb/s, 2.5Gb/s, 1Gb/s and 100Mb/s Base-T Ethernet standards
  • Accessible: Wake-on-LAN ready for remote access of home or work computer
  • AVB ready: perfect for use in pro audio and video applications where synchronization of data streams is critical
  • Cost effective: 2.5GBASE-T and 5GBASE-T technology (formerly NBASE-T) provides up to 500% faster performance over existing cabling

The Thunderbolt 3 10G Ethernet Adapter adds up to 10Gb/s Ethernet connectivity to Thunderbolt 3-equipped computers that lack built-in capabilities. If you’re a video editor, creative pro, musician, or gamer, you can experience blazing-fast transfer speeds with signal reliability, stability, and security wherever you work or play.

Engage Warp Speed File Transfers

Connecting the OWC Thunderbolt 3 10G Ethernet Adapter to your Thunderbolt 3-equipped Mac or PC adds warp speed file transfers to your workflow. Now you can access 10GBASE-T 10Gb Ethernet networks and other devices, such as a Network Attached Storage (NAS) system, to transfer large multimedia files at over 900MB/s real-world speed. While improving project efficiency and workgroup collaboration with the quickest network connection available, the adapter is also backwards compatible with other Ethernet standards including 5GBASE-T, 2.5GBASE-T, 1000BASE-T, and 100BASE-T.

Bottleneck-Free Editing Collaboration

For post-production to work at maximum efficiency, multiple editors need to collaborate and work as a team. The Thunderbolt 3 10G Ethernet Adapter keeps projects on schedule and under budget by giving multiple editing workstations the bandwidth needed for sharing and editing data-intensive creative content like video, animation, and graphics. Now editing can take place directly from files on a shared RAID storage device or NAS, such as OWC Jupiter Callisto or OWC Jupiter mini, without the time waste of downloading files to individual workstations.

Ideal for Ethernet Limited Computers

The Thunderbolt 3 10G Ethernet Adapter opens up a world of high-performance network connectivity to Thunderbolt 3-equipped notebooks that lack built-in Ethernet connectivity and to desktop machines handcuffed by a built-in 1Gb/s Ethernet port like the iMac 2017, Mac mini 2018, and All-In-One PCs.

Maximizes SOHO Networks

Without having to incur the extra expense of a full 10Gb Ethernet network, it’s becoming common for budget-constrained, yet performance-oriented creative professionals in small or home offices to connect to a 2.5 – 5Gb/s equipped router or switch. Unfortunately, these pros are often limited to Gigabit Ethernet (1Gb/s) speed by their computer. By simply adding the Thunderbolt 3 10G Ethernet Adapter to their machine, photographers, videographers, musicians, and other creative pros can now enjoy greater signal reliability, stability, and security with up to 5x faster speed on 2.5 – 5Gb/s networks and up to 10x faster speed on 10Gb Ethernet networks.

Dramatically Increases Performance and ROI of Existing Network

With an ideal combination of affordability and performance, most wired local area networks installed over the past two decades utilize Cat 5e or Cat 6 copper cabling. Unfortunately, these setups are limited to a maximum 1Gb/s speed. Thanks to its built-in 2.5GBASE-T and 5GBASE-T technology (formerly NBASE-T), the Thunderbolt 3 10G Ethernet Adapter can deliver up to 5Gb/s speed over existing cabling for up to a 500% performance increase and maximum infrastructure ROI.

Built for Optimum Network and CPU Performance

The Thunderbolt 3 10G Ethernet Adapter achieves its blazing fast transfer speed and keeps your computer performing at peak because it was built with advanced features such as flow control and 64-bit address support; TCP, UDP, and IPv4 checksum offloading; and TSO, LRO, and RSS stateless offloads.

Runs Silently Cool with Rugged and Efficient Portability

Featuring a unique ventilated design that maximizes airflow, the Thunderbolt 3 10G Ethernet Adapter’s rugged aluminum housing works as a heat sink to operate silently cool without needing a fan. The adapter draws its power from the Thunderbolt 3 port with Energy-Efficient Ethernet support for low computer-power use and no AC adapter needed. Further complimenting its portable potential is a rubber sleeve to keep the adapter safe from bumps and bruises when thrown into a backpack or gear bag.

Existing Cable Compatible

When you need to access an older or even state-of-the-art network, the Thunderbolt 3 10G Ethernet Adapter’s RJ45 socket will connect you to a wide range of existing cabling infrastructures ranging from Cat 5 to Cat 7.
- Cat 5 - Up to 1Gb/s at lengths up to 100 meters
- Cat 5e- Up to 2.5Gb/s at lengths up to 100 meters
- Cat 6 - Up to 10Gb/s at lengths up to 55 meters (up to 5Gb/s up to 100 meters) Cat6a - Up to 10Gb/s at lengths up to 100 meters
- Cat 7 - Up to 10Gb/s at lengths up to 100 meter

Pro Audio Video AVB Ready

Time-sensitive data such as audio and video media streams require Audio Video Bridging (IEEE 802.1Qav, AVB) ready gear. No sweat…the Thunderbolt 3 10G Ethernet Adapter can stream vast volumes of high-quality data to multiple destinations in real-time with very low latency over existing network cable.

Access Your Work and Home Computers Anytime, Anywhere

Thanks to network Wake-on-LAN support, you can easily wake a hibernated Windows or sleeping Mac computer for remote system management, program use, and stored file access. Now instead of having an “always on” system wasting energy — and your hard-earned money — you can keep a work or home computer in a low-power state that’s accessible anytime from any location.

CPU usage of 1.8 CPU cores is impressively low for a transfer rate of 1GB/sec.

Impressively low CPU usage for 1GB/sec transfers over 10G ethernet

Reader comments

Don C writes:

Note that Ubiquity sells a 16-port SFP+ 10-gigabit managed switch for $669. https://www.ui.com/edgemax/edgeswitch-16-xg

Four of the ports are 10GBase-T, 12 of the ports are 10Gigabit SFP+.

Amazon lists copper 10-gigabit (up to 30 meters on Cat 6A/7) SFPs for $38.99 each, so add $40 per port for copper. Optical looks to be around $21 per port for multi-mode fiber. Anyway, a fully loaded 16-port copper 10 Gigabit EdgeSwitch XG would be around $1149. https://www.amazon.com/6COM-10GBase-T-Copper-Transceiver-Ubiquiti/dp/B075WR8FHT

I have been running a Ubiquity firewall for some years (10?) now - the Edgerouter series are modern, independent derivatives of the old Vyatta Open-Source router project. Configuration can be challenging, but at least you know it’s in there somewhere.

MPG: I’d much rather have a 4-port to 8-port plain copper wiring switch, fanless and unmanaged—and no desire to deal with network management for a simple connectivity issue.

For now, I really only want high speed between the 2019 Mac Pro and 2019 iMac 5K, and I can do that with a single Cat 6 ethernet cable, which works great. So I am not going to bother with a switch.

Up to 1527MB/s sustained performance

How Secure Boot and System Integrity Protection Guard Your Mac From Malware

Tim Standing of SoftRAID has an outstanding article on how macOS protects you from malware, via System Integrity Protection (SIP) and Secure Boot features, and why turning off Secure Boot is no big deal, and required for SoftRAID and other drivers.

How Secure Boot and System Integrity Protection Guard Your Mac From Malware

Some users don’t want to disable Secure Boot because they believe it disables all malware protection on their Mac. This belief is not correct, and Apple labeling the setting for disabling Secure Boot as “No Security” in the Startup System Security application doesn’t help.

Actually, Secure Boot only protects your Mac for less than 2 minutes after the white Apple logo appears on the screen during startup. After 2 minutes, Secure Boot offers no protection.

What is protecting your Mac from malware the entire time, is System Integrity Protection (SIP). SIP starts protecting your Mac when it first boots up and continues for as long as your Mac is running. SIP ensures that software that runs on your Mac is only from developers recognized by Apple. Starting with macOS 10.14.6, SIP also assures that the software has been previously checked for malware by Apple’s malware scanning servers.

Up to 1527MB/s sustained performance

It’s Almost Too Late to Get the Last Mac that Can Run Mojave

With ARM-based Macs coming and macOS Crapalina still the most problematic macOS in history, the smart move may be to ASAP get your Mac of choice that can still run macOS Mojave.

Be darn sure to configured Software Update to not “upgrade” to macOS Catalina.

Dang I wish I could run Mojave on the 2019 Mac Pro—whenever I use my 2019 iMac 5K, the experience is largely free of constant little bugs that still plague Catalina.

To get your Mojave-ready Mac, here are some choices:

It’s not clear to me if Apple has made some firmware change such that ordering a new Mac will be able to go back to macOS Mojave (since it would ship with Catalina)—sorry I don’t have the answer here.

The rumored 2020 iMac 5K probably won’t be able to run macOS Mojave, which means I probably will not buy one, even though I’d love a 4TB or 8TB SSD and a 10-core CPU.

Dave M writes:

Thanks for the many years of advice - I was reading macperformanceguide when I was researching buying my first G5!

Regarding downgrading to Mojave, I bought a refurb 2019 iMac 5k direct from Apple a few months back and then bought 128Gb RAM from OWC for less than Apple wanted for half that amount. My reasoning was that it was the last Mac without a T2 chip, and therefore I will be able to install another OS on it after Apple dropS support for Intel Macs in MacOS. 

It came with Crapalina pre-installed, so I spent a day downgrading it, a painful process which included using my 2012 Mac Mini, which is still on High Sierra, to obtain the Mojave installer, then creating a bootable USB stick and wiping Crapalina away.

Unfortunately, the new OS had partitioned the internal SSD into a write-protected Macintosh HD and a writable Macintosh HD - Data volume, which act as one volume under 10.15. Mojave did not update this partition map, treating them as one volume during the install. Now it shows then as separate volumes, and since it can’t handle this setup, Spotlight refuses to index anything, which has clobbered search in Mail, Outlook and Alfred. Still, work to do, and the system worked, so I got on with it.

Eventually I grew tired of having no search, so split the 1tb SSD into two partitions, and used Carbon Copy Cloner to duplicate the Data partition into the new, empty partition. Booting into the Mojave-created partition fixed Spotlight, and there’s been no need to go back to the original. 

Just thought I’d let you know about this downgrade gotcha, perhaps you can share it for anyone who takes your advice and buys the 2019 iMac 5K, which is turning out to be a wonderful beast of a machine.

MPG: downgrading is indeed a PITA, but it can be done and once achieved it's good for years, which is the presumed goal—having a stable OS which remains compatible with just about everything that is good for the life of the machine.

Wipe out the internal SSD by booting off an external drive and deleting partitions and erasing.

Upgrade Your Mac Memory
At much lower cost than Apple, with more options.
Lloyd recommends 64GB for iMac or Mac Pro for photography/videography.

Disturbing Number of Bad 16-Inch MacBook Pros

I’ve had several of my consulting clients report severe problems with their 16-inch MacBook Pros. I cannot recall ever hearing so many problems of so severe a nature. I now hesitate to recommend any 2018 or 2019 MacBook Pro.

James G writes:

I mentioned months ago the problems I was having with my 16” MacBook Pro crashing, sometimes while sleeping.

The Apple geniuses at my local Apple Store plugged it in and determined it was a bad motherboard and sent it to their facility in Houston after which two days later Apple shut down all their stores.

It took two weeks for them to get a replacement motherboard (they probably had to manufacture it - in COVID-wracked China) and then another week or so to fedex it to the wrong address.

It crashed once on the first day but has been rock stable since then, except for the keyboard backlight which only lit half the keyboard. It took another couple of months until Apple reopened their stores for me to take it in. The backlight connector was loose and only partially seated. All well now, except for the usual Crapalina issues. 

Regarding macOS Big Sure, I’ll stick with macOS Crapalina until the first several waves of suckers, I mean early adopters, throw themselves on the pyre of progress like ants bridging a band of tanglefoot so those that follow can climb over the dead and dedicated bodies. The devil you know is better than the devil you don’t know.

MPG: pay a premium price for a laptop, another $350 for AppleCare because of the absurdly poor one-year warranty on this super premium priced product, then wait nearly 3 months for a $6K machine to work properly?

Upgrade the memory of your 2019 iMac up to 128GB

Apple Core Rot: Music.app Screws my Music Library, Forgetting Locations and Immediately Crashing When Searching for Missing Tracks

I have about 200GB of music and audiobooks, digitized from a huge number of CDs. I sync that to my phone. Well, when Apple doesn’t render my music library useless, as has happened half a dozen times in as many years.

Recently, I rearranged my storage onto the 16TB OWC Mercury Accelsior M42 such that the music had to go on a different volume. Apple’s Music.app of course is too stupid to find the files anywhere but by fixed location.

Apple Music: cannot find tracks

Locating the missing file fixes that track and all the other tracks in its folder.

But what about the other 12000 tracks in 500 other folders? No problem... just find one missing track and Music.app will offer to go find all the other missing tracks, right?

Apple Music: asking whether to try to find other missing files based on finding one other track

Not so fast—immediately, Music.app crashes with EXC_BAD_ACCESS (SIGSEGV). A 'SIGSEGV' crash is caused by incompetent programming; it relates to using a bad memory pointer that points to an illegal area of memory.

No number of retries or reboots or trying different tracks on different albums make any difference.

Thirty years ago, I was already layering debugging code into my software to detect such errors and using now well-known development best practices, but here we have a trillion dollar company unable to get the basics right. Ever hear of malloc_debug Apple?And many other far more powerful tools?

Apple Music: cannot find tracks

Incompetent programming is the hallmark of Apple software today, permeating all areas of the system. Apple shovels manure out the door with minimal testing for users to suffer from, then issues half a dozen updates one after another. Here we are at macOS 10.15.6 (six updates later) and the shit-show is still full steam ahead, with macOS Big Sneer and ARM-based Macs coming. You’d have to be out of your mind to embrace that combination.

I’m furious at Apple for wasting my time this way, and this is maybe the 20th such incident in the past 5 years (all areas of the system). More and more Apple Core Rot. Shame on Tim Cook for his bald-faced lies about improving Apple software quality—he’s as full of sh*t as a cattle feedlot.

But wait, it gets even 'better'. In this scenario, syncing to the iPhone goes through the motions and never syncs since it cannot find the music tracks. BUT it doesn’t issue any error or warning whatsoever, which is really confusing until you notice that it just doesn’t work and never will work until the tracks are re-located. But you wouldn’t know except that stuff just never appears on the phone.

Fixing it

I could find no way to fix the problem other starting from scratch.

  1. Deleting all tracks out of the music library (leaving original files alone)
  2. Drag the 200GB of audio tracks to Music.app re-importing all 200GB all over again.

Even more confusion

Here’s how the Finder was displaying my iPhone with this missing music issue—a blank window. It was impossible to sync it or see anything (no music, no apps, no status, no nothing). The iPhone 6 had the latest iOS (which itself is full of new bugs).

It took rebooting both the iPhone and the Mac Pro to make it show something again, and only after the music library was redone as above.

Apple Music: cannot find tracks
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A Troublesome Security and Privacy Flaw: Apple Mail Auto-Complete + How to Delete Unwanted Recipients

Apple Mail auto-complete

I am reposting this 2015 post as this idiotic Apple Mail behavior has never been fixed—auto complete remains a headache and a security hazard—designed by incompetent jackasses, it constantly substitutes semi-random info@zzz email addresses instead of the one I use 99% of the time (my own info@ email). All this talk about AI, and Apple can’t get the basic sh*t right.


Have you ever started to type in an email address, only to have Apple Mail auto-complete the address with an email you used once in the past month or year or decade? It’s gotta be happening all the time.

It happens too often to me and I receive emails from others that clearly have the same issue because the email is obviously for someone else. Then consider Consider confidential information, a classified government document, etc.

Just today I forwarded my credit card balance info to some random email that happened to be in my mail from months ago (and not in my Contacts list)—auto-complete I noticed half a second after hitting Send.

I want auto-complete for for the people in my contacts list. Yet it’s a constant risk because of this awful design. Auto-complete as implemented is a security and privacy issue that gets scant (as in none) attention from Apple. Several things could be done to improve it:


  • Auto-complete only for emails in Contacts.
  • Auto-complete only emails in Contacts that have enabled an "Allow auto-complete" option (this is my preference).
  • Don’t be stupid Apple: if I use my diglloyd.com email 100 or 1000 times more than another info@ email, why does Apple Mail choose a variant that I used once and only once in the past 10 ten years?!

It’s design with today’s mediocre Apple standards—no depth, literal and shallow thinking, no elegance, no helpfulness.

Apple pays constant lip service to protecting user privacy. How about protecting users from a commonplace risk to millions?

Related to this is the presence of long-ago emails, including non-functional/dead ones: how can dead emails be eliminated from auto complete? An email that my father used years ago still auto-completes every time I email him. So irritating—it’s not in my Contacts list, and I don’t know how to get rid of this behavior.

The failure to think about how real people use products has now become the hallmark of Apple (non) design. So little elegance anywhere anymore. It has all been “flattened” to eye candy, fooling the naive who think prettiness is good design.

Deleting previous recipients

Jim G writes:

While not convenient, you can open Previous Recipients under the Windows menu and you can delete any stored email addresses that you used from previously sent email .

I agree there should be a way to turn off auto complete but we're talking Apple here who decides what's best for us :-(

MPG: a manual feature is better than nothing! I never knew this feature existed, so thanks to Jim for pointing it out. At the least, I can now manually delete troublesome conflicting emails: I was able to use it to find and delete the troublesome "info@" emails.

What this feature does not do (so still a hassle) is to allow wildcards. So I cannot find, say, nuisance spam emails like info17@sexyballon.com by entering a wildcard expression like “info*@” or “*sex*” or similar. So it's a tedious one-by-one to find and delete unwanted emails that otherwise share a common term.

Recipients only?

Deleting previous recipients apparently means that literally: recipients. What about spam from senders which is an even bigger problem (for me at least)? Or there is just a plain bug. Either way, it’s a problem.

Apparently the nitwit implementing this Apple Core Rot feature-bug didn’t think of that, so I am stuck with info17@sexyballoon.com.

I wanted to eliminate the email 'info17@sexyballon.com'. But that email is not a recipient; it’s some annoying spam email received today trying to sell some mortgate scam (I found the message in my Spam box). See how stupid this behavior is: Apple Mail will offer to auto-complete to these spam emails, but it won’t allow them to be deleted! This type of dead-end design thinking is what troubles all Apple software these days.

Apple Mail auto-complete
Apple Mail auto-complete

James G writes:

I, too, find Apple Mail’s autocomplete a f***ing PITA. Even worse, removing previous recipients doesn't work all the time and if you remove an address it may not stay removed for very long. Yes, it may be possible to remove an email address you used once long ago, but Siri or the Apple Mail app, or something in Apple’s OS constantly goes through new mail and harvests buried email addresses. It appears that if you receive an email that is also sent to others as a recipient or CC/BCC something in the Apple software environment will harvest those other email addresses and put them in whatever library Mail then uses for its autocomplete. Even worse, it appears that Apple Mail will search through the body of received emails and scrape email addresses out of that too.

What a security nightmare! What a PITA! So even if you delete one of those ghost email addresses to whom you may never have actually sent an email, there is a high likelihood that address will magically reappear in your autocomplete within a few days/weeks/months. And there seems to be no way to turn this nonsense off.

If Steve Jobs was still alive and in charge, whoever was accountable for this crap would have been scathingly humiliated in public, fired and/or demoted to cleaning toilets in Apple’s most remote shithole facility and would be flamed so bad they would never be able to get a software job anywhere except the US Government or Microsoft.

ut now the 20-something dweebs with zero security experience who think this sort of stuff is cool, and who design their screens with unreadable microfiche fonts in gray on a light gray low contrast background with dancing emojis, have been promoted to mangers and are supervising those junior programmers who just completed their on-line class in Programming for Dummies from ITT Tech.

God help us. As if SARS COVID-19 wasn’t bad enough...

MPG: Apple makes security a pain in the ass (macOS Crapalina, T2 chip, etc)—little of which matters—and then creates huge security problems for which there is no good solution. Don’t get me started on all the admin password security holes a few years ago.

And don’t get me started on the Apple Mail VIP list, which stopped working a few years ago, and has never worked since.

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Apple Safari Web Site Security Features are Badly Designed: must be disabled for ALL web sites if just one web site has issues

Applying for a mortgage refinance, I found that the web site on which I am applying, uploading documents, etc uses cross-site tracking, and simply will not function unless this is allowed.

That’s bad enough, shame on the mortgage company. The web site sucks even more in that a password manager won’t work with its login or other pages—nor can copy/paste, so it all has to be entered manually—idiot designers.

But why are Apple engineers so half-witted as to make security and privacy settings global for all web sites?

The only way I can use this particular web site is to allow cross-site tracking for ALL web sites. So I have to turn off the tracking, do my thing, then turn it back on. Half-assed design of the mortgage web site and Apple Safari. Shame on them both.

Ditto for other security features like Enable Javascript and Cookies and website data.

While Safari is clearly superior in most ways to both Chrome and Firefox, maybe my solution is to not use Safari at all for this mortgage web site. But that doesn’t excuse Safari

Mortgage refinance web site with badly designed security measures
Security/Privacy is all or none for web sites in Apple Safari

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