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2017 iMac Pro: APFS vs HFS SSD Speed

The data on this page and others was painstakingly obtained, made possible by the support of OWC / and B&H Photo. Please order through our links via these companies and/or subscribe—thank you.

See the MPG recommendations for iMac Pro, backup, peripherals. Not sure which Mac to get or how to configure it? Consult with MPG.

This page compares SSD of the iMac Pro to other Macs.

SSD Speed: APFS vs macOS Extended

Real world speeds through the file system using diglloydTools DiskTester.
disktester run-sequential --test-size 8GB

This graph shows transfer speed across the entire drive capacity. Results were essentially identical with the 1TB and 2TB SSDs.

APFS is essentially identical to HFS for maximum write speed, but lags just slightly for read speed.

Flash Drive (SSD) Sustained Transfer Speed for large transfers across drive capacity, APF vs HFS
2017 iMac Pro

Recommended Items for iMac Pro and iMac 5K

See the recommendations page for details on why these items are recommended.

Rigorously lab tested and OWC certified.
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