It may be an installer issue. I’ve read that the Big Sur installer seems to want to rebuild the fusion drive in APFS format and has problems doing this properly in some circumstances. This may be something to do with keeping Big Sur in a separate container on the SSD. If I understood it correctly the installer creates a new container for Big Sur and when the OS is installed it wants to remove the previous OS by deleting the container. Reading that those who have erased their fusion drive and done a ‘clean install’ have had success, copying apps and user accounts back after the clean install has finished. But we all do clean installs every time, don’t we? I’m sure that was a Sam recommendation.
-- Tony Crooks [email protected] +44 7428 706227 -- You received this message because you are subscribed to the Google Groups "Sussex Mac User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/smug/CAHkKbUAPCmpbJAU9LNK2A4U%2B%2BK4iputGuXCNqs5Cr3B%2BLdFQ5w%40mail.gmail.com.
