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Sep 30, 2024 · How to reinstall macOS. Use macOS Recovery, your computer’s built-in recovery system, to reinstall the Mac operating system. Before you begin. Shut down your Mac. Start up from macOS Recovery. Reinstall macOS from Recovery. If you need help.
- Overview
- On a Mac with Apple silicon
- On an Intel-based Mac with the Apple T2 Security Chip
- On an Intel-based Mac without the Apple T2 Security Chip
You can erase your Mac and use macOS Recovery, the built-in recovery system on your Mac, to reinstall macOS.
WARNING: Erasing your Mac removes all the information from it. Before you start, back up your Mac with Time Machine.
Your computer must be connected to the internet. If you’re reinstalling on a Mac laptop, plug in the power adapter.
1.Erase your Mac using Erase Assistant.
2.Restart your Mac.
3.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.
Your computer must be connected to the internet. If you’re reinstalling on a Mac laptop, plug in the power adapter.
1.Erase your Mac using Erase Assistant.
2.Restart your Mac.
3.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.
Your computer must be connected to the internet. If you’re reinstalling on a Mac laptop, plug in the power adapter.
1.Choose Apple menu > Restart, then immediately press and hold Command-R.
2.In the Recovery app window, select Disk Utility, then click Continue.
3.In Disk Utility, select the volume you want to erase in the sidebar, then click Erase in the toolbar.
4.Type a name for the volume in the Name field, click the Format pop-up menu and choose APFS, then click Erase Volume Group.
5.When the erase process is complete, click Done, then choose Disk Utility > Quit Disk Utility.
Apr 30, 2023 · Option 1: Factory Reset Your Mac. Option 2: Wipe and Reinstall macOS from Scratch. Enjoy Your Squeaky Clean Mac. Key Takeaways. To wipe a modern Mac with Apple Silicon or T2 Security Chip, open System Settings > General > Transfer or Reset and click "Erase All Content and Settings" to open the Erase Assistant.
Sep 16, 2024 · You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful if you want to install macOS on multiple computers without downloading the installer each time, or if you can't install a compatible macOS from the Finder or macOS Recovery.
May 14, 2021 · When you’re ready, follow the steps below for reinstall macOS on your Mac. This method reinstalls the current version of the macOS on your computer; jump to the end of the article to learn how to reinstall different versions of macOS instead.
- Writer
Learn how to reinstall the operating system on your Mac, using macOS Recovery. To learn more about this topic, visit the follow article:...more.
- 3 min
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- Apple Support
Sep 2, 2021 · Learn how to reinstall macOS on your Mac desktop or MacBook without losing any of your files, documents, or data in the process.
