upgrading to Big Sur is a monumental disaster
I HAVE BEEN TRYING FOR 4 HOURS TO GET RID OF Big Sur AND RETURN TO CATALINA. ANYONE HAVE A SOLUTION. APPLE'S ADVICE WAS TO TAKE MY 27" IMAC TO A REPAIR SHOP. THEY KNOW THAT THERE IS A FLAW WITH THE LATEST UPGRADE YET GAVE ME THAT ADVICE. SOME SUPPORT
iMac 27″, macOS 10.13