how do I uninstall Big Sur
My Mac updated to Big Sur this morning. Now my compurter runs slow and no matter what program I try to open I get the beachball for several minutes. How do I revert back to OS High Sierra?
Thank you
iMac 21.5″, macOS 11.0
Do you have a Time Machine backup to Restore to/from?
https://support.apple.com/guide/mac-help/revert-to-a-previous-macos-version-mh15216/mac
If not…