Downgrading from Big Sur to Mojave
After several attempts I have managed to downgrade from Big Sur to Mojave using Recovery, all seems to work fine.
However, there are 2 changes:
1/ When I start my MacBook I get a message "Incompatible disk. This disk uses features that are not supported on this version of macOS." I have no idea which disk it is referring to and what features. I assume there are still some remains of Big Sur.
2/ Before upgrade to Big Sur I used to have just one disk - Macintosh HD (on desktop and in Storage Tab in About This Mac). Now, after downgrade back to Mojave, I have 3 disks - Macintosh HD, Macintosh HD - Data and Update. Is there a way to get rid of these 2 extra disks or it is irrelevant and I shouldn't be bothered by this. Or maybe I should do recovery process in some different way?
Would be great if you could help.
Thanks, Margaret
MacBook Air 13″, macOS 10.14