![]() ![]() When customers with an all-flash machine upgrade to macOS High Sierra install the update next week, their drives will be converted to AFPS. ![]() Public Beta testers who had a Mac with a Fusion Drive converted to APFS will need to follow a long list of instructions to convert back to HFS+, including making a Time Machine Backup, creating a bootable installer, and using Disk Utility to reformat their Macs and reinstall macOS High Sierra.Īpple on September 5 published a support document confirming compatibility. x HS update (especially since I feel that my Mac, then at age 9, will never get to run macOS 10.14 at all). I must add that I'm a bit pissed at Apple for what I hope will only be a small delay, and I'm willing to give them a pass if they do release APFS for Fusion Drives and Time Machine in a. And the boot speed when booting into recovery mode seems to corroborate that it's not as fast as booting from your main Fusion Drive-formatted macOS volume (a process very likely sped up by boot caches, which macOS external installers/internal Recovery HDs probably lack), but it surely is much faster than booting from even an internal 3.5'' 7200 RPM HDD.Īnd I should know the difference my Late '09 27'' iMac started off with a 7200 RPM 1TB HDD, then it was upgraded to a 5400 RPM 2 TB HDD (a really dumb move, if I may add), afterwards it was upgraded to a 120 GB SSD + 7200 RPM 2 TB HDD Fusion Drive, and said SSD was then upgraded twice after that (first I picked a 240 GB Crucial BX200 – worst choice ever, as multiple units of that particular model malfunctioned and KP'ed on my machine and on many different MacBook Pro configs as well – and then swapped it with a 250 GB Samsung EVO 840, and it's been chugging along just fine ever since). Actually, I believe the hidden Recovery HD partition in Fusion Drives is created on whichever drive you set as the first one (that being usually the SSD).
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