I’d avoid updating to Big Sur with a fusion drive. This has failed for a number of iMac users to date although rebuilding the fusion drive seems to overcome the problem ( not aware what is required to do this other than it requires use of the Terminal app).
You can check on this on the Apple Community Forum in Apple's Support pages. -- 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/CAHkKbUCnsdULspmN1u-m57uHb0pA8_oU2LftvJpAjuiN_yc%3DrA%40mail.gmail.com.
