What APFS Does for You, and What You Can Do with APFS

Article Comments
21

What is the earliest OS that will force you to APFS?

Diane

22

Catalina for all drives. I believe Mojave for SSDā€™s, but I would recommend using APFS for High Sierra SSDā€™s but not a Fusion drive.

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23

When I installed an SSD on an aging MacBook running High Sierra it automatically formatted the SSD as APFS.

When I replaced the optical drive in that same MacBook with an SSD it left the formatting choice to me. After doing some online searching to gain opinions/advice on how best to format a drive used to replace an optical drive I was unable to find solid advice one way or another. In the end I opted to format that SSD as APFS as well and so far have not come up against anything suggesting that was a poor choice.

24

Thanks - I need to upgrade my 2015 MBPr to HS for TurboTax, so thatā€™s a SSD. Will there be issues with files if I do that? How about my external drives that are not SSD?

(I had started a thread on this the other day but got no responses, feel free to respond there if you think itā€™s more appropriate.

Thanks!

Diane

25

Not at all. Files are exactly the same no matter how the drive is formatted.

No impact. Time Machine drives must be HFS+, regardless of whether they are spinners or SSDs.

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