Hey, I just updated to BigSur just because, novelty maybe? I do not run anything that is needed or important. So I did update to bigsur and found that i got a huge performance hit. Is really slow changing users, and even booting. So, I want ballistic and did a complete clean install and still the same. Any ideas? My MacBook Pro 13 inch is 16 gb ram, 2.7 ghz quad core i7, at the moment I have 950 go free on ssd.
You probably want to start with Activity Monitor and Console. You might want one of
Howard Oakley’s log viewing tools as well.