Same problem here. I had Sierra OS 10.12.6 and it worked beautifully. But I needed to installed Office 365 so had to update. Called Microsoft and they walked me through the update and they chose BigSur. What a mistake. It is soooooo slow plus I have to keep putting in passwords and getting texts to verify. What a pain. How dumb of Microsoft, full knowing that there were problems with this update. I could have done Mojave or Catalina.
Now what do we do, are we stuck with this update and can we downgrade?
CrazyCarol
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