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Level 1

10 points

New SSD and APFS

I recently replaced the HDD in my 2010 MacBook Pro with a new SSD. I also have an external HDD for Time Machine backups. I was already running High Sierra and I did the following:

1) After installing the new SSD I booted into macOS Recovery (by holding Command-R) and opened Disk Utility.

2) There, I formatted the new SSD as APFS.

3) I then went back to macOS Recovery and selected "Restore From Time Machine Backup" and restored from my most recent backup on the external HDD.

4) After that finished and booted into High Sierra, the system reported that my file system for the SSD is Mac OS Extended (Journaled).

So my question is, why did it change from APFS to Mac OS Extended (Journaled)? Is it because my Time Machine backup used Mac OS Extended (Journaled) and it automatically converted it when the "Restore From Time Machine Backup" option was used?

MacBook Pro, macOS High Sierra (10.13.3)

Posted on Feb 28, 2018 9:38 AM

Best reply

John Galt

Level 10

141,356 points

Posted on Feb 28, 2018 9:51 AM

The answer to your question is "because that's what Time Machine does."

It's normal. You can convert it to APFS using Disk Utility. Beware that doing so might result in macOS updates or future upgrades not working. Apple has zero interest in supporting SSDs that they do not incorporate themselves in the products they build.

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New SSD and APFS

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