problems with macOS Big Sur. Now, some of my non-apple desktop apps crash. How can I reverse the update
problems with macOS Big Sur. Now, some of my non-apple desktop apps crash. How can I reverse the update?
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How can I reverse the update?
Restore the backup you made prior to upgrading.
If you don't have a backup, manually back up your files and export any library-based content (like Photos) as individual files.
Erase your drive and install the OS you want to use: How to get old versions of macOS - Apple Support