Whether it's to fix problems with your Mac, or get it ready to sell on to someone else, macOS Recovery, also known as Mac Recovery Mode, is a powerful tool to help you.

Related: How to do a full wipe on your Mac QUICK ANSWER To reinstall macOS, first boot into macOS Recovery. From there, select the Settings option, enter your password, and select Reinstall macOS.

Most people don’t use the Recovery Tool to wipe and reinstall macOS on a brand-new system. But if you do, make sure you first update to macOS Big Sur to ensure the Mac Recovery tool will work ...

With your computer still in macOS Recovery, select Reinstall macOS and follow the instructions on your screen to reinstall macOS Catalina.

If you don’t have a Recovery partition or you can’t restart as above, proceed to reinstall, revive, or restore. Reinstall, revive, or restore The easiest next step is to reinstall macOS.