What resetting your Apple computer means and when to do it

Resetting an Apple computer wipes the drive and reinstalls the operating system from scratch. The process erases all your files, programs, and settings, leaving you with a machine that looks and works like it did the day it shipped from Apple. You should reset if your Mac is running slowly, crashing often, infected with malware, or if you are selling or giving it away.

The steps differ depending on whether your Mac has an Intel processor or an Apple Silicon chip (M1, M2, M3, or later). Both routes take 30 minutes to an hour, though the read and reinstall can take longer on slower internet. You will need your Apple ID and password, and you should back up any files you want to keep before you start.

Key Takeaways

  • Intel Macs use Command-R at startup to enter Recovery Mode, while Apple Silicon Macs use Command-Option-R or hold the power button for 10 seconds.
  • You must erase the drive using Disk Utility before reinstalling macOS, and this step cannot be undone.
  • The entire process requires your Apple ID and password to complete, and your Mac will restart multiple times.
  • After the reset finishes, your Mac will boot into the setup screen as if it were brand new, and you can choose whether to restore from a backup or set it up fresh.

Resetting an Intel Mac

Start by backing up any files you want to keep. Connect an external drive, open Migration Assistant (in Applications > Utilities), and follow the prompts to copy your files. Once that is done, shut down your Mac completely.

Turn the Mac back on and when ready hold down Command and R together. Keep holding until you see the Apple logo or a spinning globe. This takes you into Recovery Mode. When the macOS Utilities window appears, click Disk Utility.

In Disk Utility, select your main drive (usually called "Macintosh HD") from the list on the left. Click the Erase button at the top. Choose a name for the drive (you can keep the default), set the format to APFS, and click Erase. The process takes a few minutes. When it finishes, close Disk Utility and return to the Utilities window.

Click Reinstall macOS (or Reinstall OS X on older machines). Follow the prompts, agree to the terms, and select the erased drive as the destination. The read and installation will take 20 to 40 minutes depending on your internet speed. Your Mac will restart several times during this process — do not turn it off.

Resetting an Apple Silicon Mac (M1, M2, M3, and later)

Back up your files first using Migration Assistant or an external drive. Shut down your Mac completely. Hold down the power button (not the Touch ID sensor) for about 10 seconds until you see "Loading startup options" on the screen. Release the button.

You will see a startup disk icon and a gear icon labeled Options. Click Options, then click Continue. Enter your Apple ID and password when prompted. This step is required even though you are erasing the drive.

When the macOS Utilities window opens, click Disk Utility. Select your main drive from the list on the left and click Erase. Give the drive a name, confirm the format is APFS, and click Erase. Close Disk Utility when it finishes.

Return to the Utilities window and click Reinstall macOS. Follow the prompts, agree to the license, and choose the erased drive as the destination. The read and reinstall will take 20 to 40 minutes. Your Mac will restart multiple times — this is normal and expected.

What happens after the reset completes

When the installation finishes, your Mac will boot into the Setup Assistant, the same screen you see when a new Mac first starts. You will be asked to choose your language, connect to Wi-Fi, and sign in with your Apple ID. You can then choose to restore from a Time Machine backup (if you have one) or set up the Mac as new.

If you restore from a backup, your files, programs, and settings will return to the state they were in when the backup was made. If you set up as new, you will have a completely clean Mac and will need to reinstall your programs from the App Store or their original installers. Either way, the reset is complete once you reach the desktop.

Troubleshooting a stuck or failed reset

If your Mac gets stuck on the loading screen or the installation fails, force restart it by holding the power button for 10 seconds (Apple Silicon) or by holding Command-Control-Power (Intel). Wait 30 seconds, then try the reset again from the beginning.

If you forget your Apple ID password and cannot proceed, you will need to reset it at iforgot.apple.com before trying the reset again. If your drive is damaged and Disk Utility will not erase it, the drive may need professional repair — contact Apple Support or visit an Apple Store.

If the Mac will not enter Recovery Mode, try a different keyboard. Some wireless keyboards do not register the Command key reliably during startup. A wired keyboard or a different wireless keyboard often solves this problem.

Preparing to sell or give away your Mac after reset

After the reset completes and you reach the Setup Assistant, do not proceed past the language and region screen if you are selling or giving the Mac to someone else. Stop there and hand the Mac over — the new owner will complete the setup with their own Apple ID and preferences.

If you have already completed the setup, you can remove your Apple ID by going to System Settings > General > Transfer or Reset, then clicking Erase All Content and Settings. This removes your account from the Mac while leaving macOS installed, so the next owner can set it up fresh.

Frequently Asked Questions

Do I lose all my files when I reset my Mac?

Yes. Resetting erases everything on the drive. Back up your files to an external drive or iCloud before you start. After the reset, you can restore from that backup if you want your files back.

How do I know if my Mac has an Intel or Apple Silicon processor?

Click the Apple menu in the top left and select About This Mac. Look at the "Processor" or "Chip" line. If it says Intel, follow the Intel steps. If it says M1, M2, M3, or M4, follow the Apple Silicon steps.

Can I reset my Mac if I forgot my Apple ID password?

No. You will need your Apple ID password to complete the reset on any Mac made after 2016. Go to iforgot.apple.com to reset your password before you start the Mac reset process.

What if my Mac will not start up in Recovery Mode?

Try using a wired keyboard instead of a wireless one — wireless keyboards sometimes do not register the startup key combination. If that does not work, restart the Mac and try holding the keys again, making sure you hold them when ready after pressing the power button.

Can I undo a reset after I erase the drive?

No. Once you click Erase in Disk Utility, the data is gone. That is why backing up before you start is essential. If you erased by mistake and have not restarted yet, shut down when ready and do not turn the Mac back on — contact a data recovery service.