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New Mac Pro?

Or iMac 5K or iMac Pro?
Consult with Lloyd ASAP before buying!


System configuration for CPU, GPU, memory, SSD, backup, RAID, optimizing performance, workflow.
For YOUR optimal workflow

Avoid costly mistakes in throwing money at the problem for less performance and/or buying the wrong machine for your own needs!

Remote screen sharing available for RAID, software configuration, etc.

More about 2019 Mac Pro vs iMac 5K vs iMac Pro...

Update on Apple 'Fusion': Writes are Fast, No Smart Migration

Using a 'Fusion' setup consisting of an Apple 1TB hard drive and an OWC 240GB Mercury Extreme Pro 6G, I have confirmed the following:

  • The Fusion setup attempts to keep ~4GB of SSD space available for writes.
  • Saving a large (2GB) Photoshop file (uncompressed for save speed) benefits from SSD speed.
  • Saving a 2nd 2GB file right away after the first 2GB save shows performance falling off a cliff as the writes are forced to the hard drive (not enough SSD space).
  • There is no intelligent migration, or at least it is so slow to learn/adapt that as a practical matter is is pretty much worthless for anything I would do.

In short, writes are fast, at least if not too much is written in a short period of time and not too large a burst.

No smart migration

What I have NOT been able to find is any intelligent migration activity: repeated viewing of images which are known to be on the hard drive does NOT cause migration to the SSD. Hence performance remains poor for reads on files that I’ve used for real-world viewing over and over.

Hence storing a Lightroom catalog or similar on a Fusion drive is massively inferior to storing it on an explicit SSD volume. Where people get fooled is starting to use a Fusion drive which has an SSD still with ample space. That’s not Fusion at work, that’s just the SSD not yet full.

Better solutions exist

The Fusion technology has some limited benefits, but I maintain that Apple Fusion is a mediocre (at best) solution for anyone looking for workstation performance; all my real-world usage scenarios show it to be an abject performance failure as compared to having two separate volumes and using each appropriately. The Apple SSD is not particularly fast either.

But the Apple reality distortion field remains strong.

Casual usage— a bump up in performance over just a hard drive is fine— why not if one accepts the limitations and risks: see Dual Drives Are Better than 'Fusion'.

But an explicit SSD boot drive of ~240GB along with a 1TB hard drive remains superior for most everything, at least if one is willing to apply a small amount of brain power to one’s usage. If not, then it’s a “toaster” for routine tasks, and as such Fusion is fine. But to get excited about Fusion for serious work is laughable.

Two volumes are better

See Dual Drives Are Better than 'Fusion'.

Two volumes consisting of a 240GB OWC 6G SSD and the Apple 1TB HDD delivers guaranteed faster performance for important tasks, because one can use the SSD specifically for anything where fast I/O speed is needed (e.g. saving big files, Lightroom catalogs, current projects, the system/apps, etc).

The idea of wanting to store iTunes and the like on an SSD are misguided— data rates required for playing HD ideo and music are snail-pace slow, so storing music and videos on an SSD is pointless; there is no performance gain to be had. Any hard drive will do for such stuff.

Save Big $$$$ on Memory for 2019 Mac Pro

Up to 65% better pricing than Apple

Lloyd recommends 32GB RDIMM modules for most users (more expensive LRDIMMS are for 512GB or more).


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