Reinstall macOS
You can use macOS Recovery, the built-in recovery system on your Mac, to reinstall macOS. macOS Recovery keeps your files and user settings intact when reinstalling.
Important: Your computer must be connected to the internet to reinstall macOS.
- Start up your computer in macOS Recovery:
- On a Mac with Apple silicon: Choose Apple menu
> Shut Down, press and hold the power button until “Loading startup options” appears, select Options, click Continue, then follow the onscreen instructions.
- On an Intel-based Mac: Choose Apple menu
> Restart, then immediately press and hold one of these key combinations, depending on what you want to do:
- Install the latest version of macOS compatible with your computer: Option-Command-R.
- Reinstall your computer’s original version of macOS (including available updates): Option-Shift-Command-R.
- Reinstall your current version of macOS: Command-R.
- On a Mac with Apple silicon: Choose Apple menu
- In the Recovery app window, select Reinstall for your macOS release, then click Continue.
- Follow the onscreen instructions.
- In the settings where you select a volume, select your current macOS volume (in most cases, it’s the only one available).