Apple hasn’t said exactly when a Fusion APFS upgrade will be ready. It’s rarely a bad idea to wait for macOS 10.X.1 or even 10.X.2.Īpple isn’t automatically upgrading Fusion drives, the combination of SSD and hard disk drive (HDD) that it’s popularized for higher-capacity systems, because SSDs remain quite expensive above 512GB. This shouldn’t be a problem, because it’s unnoticeable, but it might be a reason for you to delay moving to High Sierra if you have an SSD boot partition and want to make sure no APFS issues emerge for other people. (An earlier version of this article misstated that the checkbox remained.
However, Apple removed that checkbox for the final release. There was a choice to bypass migrating to APFS while installing High Sierra during the beta period. You’re required to upgrade any SSD startup volume when you install High Sierra-there’s no way to prevent it. But it’s not backwards compatible with older versions of OS X or macOS.
APFS offers a lot of advantages for SSD performance and durability, as well as encryption for any type of drive. Some Macworld readers are concerned about upgrading to macOS High Sierra, which offers the new APFS (Apple File System) that replaces the nearly 20-year-old HFS+ filesystem.
