If I can help somebody I just would recommend NOT to install Big Sur, again, if you have doubts DON'T DO IT, it will tear apart your mac/iMac I have an iMac Late 2014 with 32 GB RAM and 1TB SSD hard drive that worked perfectly until I updated to Big Sur Things that happened after installing big sur: OS Boot delayed: From 10 seconds to more than 30, some times even more than 1 minute Terribly slow: After Big Sur, opening just one program slows the computer, now I can't use iMovie and any other software because the computer collapses Permissions issue: After updating I had several issues with permissions, I couldn't write to folders I did and more important, I couldn't use the System Preferences because it said my user wasn't admin, I've been using the same user for more than 6 years.