Recovery & Reinstall

Explains how to reinstall macOS from macOS Recovery, which macOS version you will get and what to try if the reinstall fails.

Explains how to boot into macOS Recovery on Apple silicon and Intel Macs, plus troubleshooting for startups that fail or stall.

Shows how to wipe the startup disk of an Apple silicon Mac in Recovery and then reinstall macOS, with advice on backing up first.

Explains how to erase and format the startup disk of an Intel Mac from Recovery, and notes that newer macOS versions have different recommended steps.

Describes the recovery tools on Apple silicon Macs for repairing storage, reinstalling macOS, restoring from Time Machine and changing security settings.

Covers the same recovery tools for Intel Macs, started by holding a key combination such as Command-R at startup.

Guide for erasing and reinstalling macOS on an Intel Mac without the T2 chip using Recovery. Apple says Apple silicon users should follow a different guide.