- Joined
- Jul 17, 2009
- Messages
- 15,770
- Reaction score
- 2,110
- Points
- 113
- Location
- MA
- Your Mac's Specs
- 2022 Mac Studio M1 Max, 2023 M2 MBA
macOS High Sierra is going through its public beta and is expected to be released later this year. One of the big features of High Sierra is the introduction of APFS (Apple new filesystem) which is targeting Flash/SSD storage. As per the support note, installing High Sierra on a Mac with a Flash/SSD will cause the conversion from HFS to APFS is automatic and cannot be opt'ed out of.
Macs with regular HDDs and Fusion drive are exempt from the automatic conversion, but it isn't clear if APFS will support those drives (initial thinking is that it wouldn't)..
So, unlike previous upgrades of macOS where you may have been a little gung-** with the upgrade without properly backing up everything, the upgrade to High Sierra isn't one of those. Make sure you have a good (bootable) backup of your existing machine and all of your data (ideally in multiple forms) to go back if things go awry..
Read more: https://support.apple.com/en-us/HT208018
Macs with regular HDDs and Fusion drive are exempt from the automatic conversion, but it isn't clear if APFS will support those drives (initial thinking is that it wouldn't)..
So, unlike previous upgrades of macOS where you may have been a little gung-** with the upgrade without properly backing up everything, the upgrade to High Sierra isn't one of those. Make sure you have a good (bootable) backup of your existing machine and all of your data (ideally in multiple forms) to go back if things go awry..
Read more: https://support.apple.com/en-us/HT208018