All Posts by Date or last 15, 30, 90 or 180 days.
also by Lloyd: diglloyd.com photography and WindInMyFace.com

Thank you for buying via links and ads on this site,
which earn me advertising fees or commissions.
As an Amazon Associate I earn from qualifying purchases.

Other World Computing...
B&H Photo...
Amazon
As an Amazon Associate I earn from qualifying purchases.
Memory Upgrades for 2019 Mac Pro - Save Up to 65% vs Factory Costs
877-865-7002
Today’s Deal Zone Items... Handpicked deals...
$348 $298
SAVE $50

$170 $120
SAVE $50

$300 $175
SAVE $125

$989 $869
SAVE $120

$400 $310
SAVE $90

$1499 $1149
SAVE $350

$322 $242
SAVE $80

$1499 $1149
SAVE $350

$180 $180
SAVE $click

$500 $275
SAVE $225

$180 $156
SAVE $24

$130 $100
SAVE $30

$3498 $2998
SAVE $500

$1699 $1149
SAVE $550

$280 $230
SAVE $50

$1899 $1499
SAVE $400

$4499 $3499
SAVE $1000

$2198 $1998
SAVE $200

$3998 $3498
SAVE $500

$1799 $1699
SAVE $100

$18599 $16599
SAVE $2000

$1149 $849
SAVE $300

$650 $450
SAVE $200

$199 $119
SAVE $80

$280 $200
SAVE $80

$1399 $1049
SAVE $350

$1199 $779
SAVE $420

$250 $220
SAVE $30

$1699 $1149
SAVE $550

$195 $125
SAVE $70

$79 $49
SAVE $30

$120 $30
SAVE $90

$198 $148
SAVE $50

$3899 $1499
SAVE $2400

$2999 $1999
SAVE $1000

$1699 $899
SAVE $800

$1698 $1198
SAVE $500

$1149 $849
SAVE $300

$1399 $1049
SAVE $350

$1498 $998
SAVE $500

$2797 $2497
SAVE $300

$280 $230
SAVE $50

$799 $549
SAVE $250

$899 $549
SAVE $350

$420 $170
SAVE $250

$1699 $1149
SAVE $550

Understanding Thunderbolt 3 Daisy Chaining

Get Thunderbolt devices and storage at MacSales.com.

See also: Understanding Thunderbolt 3 Bandwidth.

Thunderbolt 3 can “daisy chain” devices”. Daisy-chaining means that one device can plug into the end of a string of devices, one after the other. Each device must be powered on for subsequent devices to operate, which is why a Mac with four Thunderbolt 3 ports (versus just two) is a huge plus—some devices can be turned on or off independently of others.

USB and USB-C cannot daisy chain at all; they must plug into a star topology, e.g., directly into the computer or into the older and slower technology of a USB 3.1 hub (there is no such thing as a USB-C hub, as it is part of Thunderbolt 3).

There is another Thunderbolt 3 limit: a maximum of six (6) devices per Thunderbolt 3 bus (and good luck not having cable-jiggle problems with random disconnects). From Thunderbolt 3 Technology Brief:

If each consecutive device is a Thunderbolt device, up to 6 devices in a chain can be supported. At any time if a USB or DisplayPort device is plugged directly into the USB-C connector downstream from any device, then the Thunderbolt daisy chain is terminated at that point.

This 6-device limit is not an issue with the 2019 MacBook Pro or 2018 MacBook Pro or 2019 Mac mini or 2017 iMac Pro since those machines have dual Thunderbolt 3 busses supporting up to 12 devices (the 2019 Mac Pro with optional expansion cards can supports more).

But the 2017 iMac 5K has a single Thunderbolt 3 bus, and making it much worse in a practical sense when juggling devices, only two ports. Strangely, Apple did not fix this limitation with the otherwise superb 2019 iMac 5K.

Which leads me to:

Apple 2017 iMac 5K is a Terrific Machine, but Too Often It Impedes My Work

OWC Envoy Pro EX SSD
Blazingly fast Thunderbolt 3 SSD!

Up to 4TB capacity, USB-C compatible.

USB-C model also available


Great for travel or for desktop!
OWC Envoy Express

World’s first Thunderbolt 3 M.2 NVME SSD enclosure.

Super fast, bus-powered, 3.3 oz, DIY easy, rugged and compact!


See also OWC Express 4M2
√ No more slow and noisy hard drives!
OWC Thunderblade Thunderbolt 3 SSD

Blazing fast, up to 16TB.

YEE HAH!



√ No more slow and noisy hard drives!
OWC Accelsior 4M2 PCIe SSD
6000 MB/sec!
Mac or PC.


Ideal for Lightroom, Photoshop, video.
Capacity up to 16TB!

Save the tax, we pay you back, instantly!
View all handpicked deals...

Lexar 128GB Professional 2000x UHS-II SDXC Memory Card
$170 $120
SAVE $50

diglloyd.com | Terms of Use | PRIVACY POLICY
Contact | About Lloyd Chambers | Consulting | Photo Tours
Mailing Lists | RSS Feeds | Twitter
Copyright © 2020 diglloyd Inc, all rights reserved.
Display info: __RETINA_INFO_STATUS__