What a Factory Reset Does and When You Need One

A factory reset erases everything on your Mac — all files, programs, settings, and user accounts — and reinstalls a clean copy of macOS. After the reset, your computer will look and run exactly as it did the day it left the factory. You should do this if your Mac is running slowly due to accumulated clutter, if you are selling or giving away the computer, if malware has infected it, or if you want to start fresh with a new setup.

The process takes 30 minutes to two hours depending on your Mac model and internet speed. You will need your Apple ID password, a stable internet connection, and an external hard drive if you want to back up your files first. Once you start, you cannot stop the reset without losing data, so make sure you have time to see it through.

Key Takeaways

  • Back up your files to an external drive or iCloud before you begin, because the reset will delete everything on your Mac.
  • You will need your Apple ID password to complete the reset and sign back into your computer afterward.
  • The steps differ slightly between Intel Macs and Apple Silicon Macs (M1, M2, M3 chips), so identify your Mac first by clicking the Apple menu and selecting "About This Mac".
  • After the reset finishes, your Mac will restart and show the setup screen, where you can choose to restore from a backup or set up as new.
  • The entire process takes 30 minutes to two hours; do not turn off your Mac or unplug it during the reset.

Back Up Your Files Before You Start

Before you erase anything, copy your important files to an external hard drive or to iCloud. Plug in an external drive, open Finder, and drag your Documents, Desktop, and Downloads folders to the drive. This takes 10 to 30 minutes depending on how much data you have.

Alternatively, turn on iCloud Drive in System Settings (or System Preferences on older Macs) and let your files sync to the cloud. This is slower but requires no external hardware. Either way, verify that your files copied successfully by checking the external drive or iCloud before you proceed.

Identify Your Mac Model and Chip Type

Click the Apple menu in the top-left corner and select "About This Mac". Look at the line that says "Chip" or "Processor". If it says M1, M2, M3, M4, or any letter followed by a number, you have an Apple Silicon Mac. If it says "Intel Core", you have an Intel Mac. The reset steps are slightly different for each type.

Write down your Mac model and chip type — you will need this information if you run into trouble during the reset. Also note your macOS version (the line that says "System Software" or "macOS"). You can close this window once you have the information.

Factory Reset on an Apple Silicon Mac (M1, M2, M3, M4)

Click the Apple menu and select "System Settings". Scroll down and click "General" in the left sidebar. Click "Transfer or Reset" near the bottom of the window. Click "Erase All Content and Settings". A warning will appear asking you to confirm — click "Continue".

Your Mac will ask for your Apple ID password. Enter it and click "Continue". The computer will restart and show a progress bar. Do not turn off your Mac or unplug it. The reset will take 20 to 45 minutes. When it finishes, your Mac will restart and show the setup screen with "Hello" displayed.

Factory Reset on an Intel Mac

Restart your Mac and hold down Command + R as soon as you hear the startup sound. Keep holding until you see the Apple logo or a spinning globe. This boots your Mac into Recovery Mode. When the macOS Utilities window appears, click "Disk Utility" and then "Continue".

In Disk Utility, click "Macintosh HD" (or the name of your main drive) in the left sidebar. Click the "Erase" button at the top. A dialog will ask for a name and format — leave both as they are and click "Erase". Disk Utility will wipe the drive. This takes 5 to 15 minutes. When it finishes, close Disk Utility and click "Reinstall macOS" from the Utilities window. Your Mac will read and install a fresh copy of macOS. This takes 20 to 60 minutes depending on your internet speed.

Set Up Your Mac After the Reset

When your Mac restarts after the reset, you will see the "Hello" setup screen. Choose your language and country, then connect to your Wi-Fi network. On the next screen, you can choose to restore from a Time Machine backup, restore from another Mac, or set up as new. If you backed up your files, select "Restore from a Time Machine backup" and plug in your external drive. If you want a completely clean start, select "Set Up as New Mac".

Enter your Apple ID and password when prompted. Create a new user account or use your existing one. Your Mac will read and install any available updates. This final step takes 10 to 30 minutes. Once it finishes, your Mac is ready to use.

Common Mistakes to Avoid

Do not unplug your Mac or close the lid during the reset. If the power goes out, your Mac may not restart properly. If you have a laptop, plug it in before you begin and leave it plugged in until the reset is complete.

Do not forget your Apple ID password. You will need it to sign back in after the reset. If you do not remember it, you can reset it on another device by visiting iforgot.apple.com, but this takes extra time. Write down your password before you start.

Do not skip the backup step. Once the reset begins, your files are gone. If you realize you forgot something important, you cannot recover it unless you backed it up first.

Frequently Asked Questions

Can I factory reset my Mac without erasing my files?

No. A factory reset always erases everything. If you want to keep your files, back them up to an external drive or iCloud first, then restore them after the reset is complete.

What if my Mac is too slow to back up my files?

If your Mac is extremely slow, you can skip the backup and proceed with the reset. However, you will lose all your files. If the files are important, try restarting your Mac first — sometimes a restart speeds things up enough to copy files to an external drive.

How long does a factory reset actually take?

The entire process takes 30 minutes to two hours. The reset itself is usually 20 to 45 minutes, and reinstalling macOS takes 20 to 60 minutes depending on your internet speed. Intel Macs typically take longer than Apple Silicon Macs.

Do I need to reinstall my programs after a factory reset?

Yes, unless you restore from a Time Machine backup. If you set up as new, you will need to read and install all your programs again from the App Store or the program's website. If you restore from a backup, your programs will come back automatically.

What if my Mac gets stuck during the reset?

If your Mac is stuck on the progress bar for more than two hours, force restart it by holding the power button for 10 seconds. Then restart and try the reset again. If it gets stuck again, contact Apple Support — your Mac may have a hardware problem.