[SES1066]

APFS is available for all Macs with solid state storage, but it is not available for Fusion drives or standard hard drives.

As I understand from Apple, this is true for the current iteration but that they are working on it for a future 13.x release. There is apparently a problem that became evident in the public beta testing. I am VERY GLAD that I did not subject my 3T Fusion iMac to the beta, backing out looks PAINFUL!

[Swordmaker]

As I understand from Apple, this is true for the current iteration but that they are working on it for a future 13.x release. There is apparently a problem that became evident in the public beta testing. I am VERY GLAD that I did not subject my 3T Fusion iMac to the beta, backing out looks PAINFUL!

Not a problem per se, but a complicated install procedure for Fusion Drives that Apple did not feel comfortable releasing in a general release. The formatting of the APFS does not lend itself well to combining two different types of drives being a virtual single type of drive without going through more circumlocutions than an automatic installer can safely do without running too high a risk of data loss. Even partitioning Fusion Drives can cause such problems.