What resetting your Mac means and when to do it

Resetting your Mac wipes the drive and reinstalls macOS from scratch, returning the machine to the state it left the factory. This is different from restarting (which just reboots the system) or signing out of your account (which leaves files and settings intact). A full reset erases everything—your files, applications, accounts, and settings—so use it only when you need a clean slate.

You might reset your Mac if it's running slowly due to years of accumulated files and settings, if you're selling or giving it away and want to remove your personal data, if malware or corruption has made the system unstable, or if you're troubleshooting a persistent problem that a restart won't fix. Before you reset, back up anything you want to keep using Time Machine or another backup method.

Key Takeaways

  • Back up your entire Mac using Time Machine or another method before you start, because resetting erases everything on the drive.
  • On Intel Macs, restart while holding Command + R to enter Recovery Mode, then use Erase and Reinstall from the Utilities menu.
  • On Apple Silicon Macs (M1, M2, M3), restart and hold the power button until you see "Loading startup options," then select your startup disk and erase it from Disk Utility.
  • The reset process takes 30 minutes to several hours depending on your internet speed and Mac model, and you'll need to set up the Mac as new when it finishes.
  • If your Mac won't start normally, you can still reset it by booting into Recovery Mode or using another Mac with a bootable installer.

How to reset an Intel Mac

Shut down your Mac completely. Turn it back on and when ready press and hold Command + R until you see the Apple logo or a spinning globe. This boots you into Recovery Mode, a separate system partition that exists outside your main drive. You'll see the macOS Utilities window with several options.

Click Disk Utility and select your main drive (usually called "Macintosh HD" or similar). Click the Erase button at the top, choose a name for the drive, set the format to APFS (or Mac OS Extended if you're running an older macOS version), and confirm. This wipes the drive completely. Close Disk Utility when finished.

Go back to the Utilities window and click Reinstall macOS. Follow the prompts to read and install a fresh copy of the operating system. This step requires an internet connection and can take 30 minutes to several hours. When installation finishes, your Mac will restart and ask you to set it up as a new machine—choose your language, create or sign into an Apple account, and configure your preferences.

How to reset an Apple Silicon Mac (M1, M2, M3, and newer)

The process for Apple Silicon Macs is similar but uses a different entry point. Shut down your Mac completely. Press the power button and hold it until you see "Loading startup options" with a gear icon. This usually takes about 10 seconds. You'll see your available startup disks.

Select your main drive, then click the gear icon or "Options" button. Choose Erase Mac from the menu. This opens Erase Assistant, which walks you through naming the drive and choosing the file system format (APFS is the standard for modern Macs). Confirm the erase, and the process begins. Your drive will be wiped and macOS will reinstall automatically.

When the installation finishes, your Mac will restart and present the setup screen. You'll be prompted to choose your language, sign into your Apple account, and configure basic settings. The entire process typically takes 45 minutes to two hours on Apple Silicon machines.

Backing up before you reset

Time Machine is the built-in backup tool on macOS and the easiest way to save your files before a reset. Plug in an external drive (at least as large as the data you want to back up), open System Preferences or System Settings, find Time Machine, and click Select Backup Disk. Choose your external drive and turn Time Machine on. It will back up automatically and continuously after that.

If you don't have an external drive, you can copy important files to cloud storage like iCloud Drive, Google Drive, or Dropbox before you reset. After the reset is complete and your Mac is set up again, you can restore from your Time Machine backup by choosing Restore from Time Machine Backup during the initial setup, or you can manually copy files back from cloud storage.

Do not rely on iCloud to back up everything—it syncs only certain folders like Documents and Desktop if you have iCloud Drive enabled, and it doesn't back up applications or system settings. For a complete backup, use Time Machine or a third-party backup tool.

What to do if your Mac won't start normally

If your Mac is stuck on a loading screen, won't turn on, or crashes repeatedly, you can still reset it. Try booting into Recovery Mode using the same method as above (Command + R for Intel, or power button hold for Apple Silicon). If Recovery Mode loads, follow the reset steps normally.

If Recovery Mode won't load, you can create a bootable macOS installer on another Mac or use another Mac to reinstall the operating system on your Mac over the network. This requires an external drive or a second computer, and the process is more involved—if you reach this point, contact Apple Support or visit an Apple Store for guidance.

After the reset: setting up your Mac

When your Mac restarts after the reset, it will ask you to set it up as if it were brand new. You'll choose your language, connect to Wi-Fi, sign into your Apple account, and configure privacy settings. This usually takes 10 to 20 minutes. You can skip some steps and configure them later in System Settings.

If you backed up with Time Machine, you can restore your files and settings during setup by choosing Restore from Time Machine Backup when prompted. This brings back your files, applications, and most settings without reinstalling the operating system. If you didn't back up, you'll need to reinstall your applications from the App Store or their original installers and manually restore any files you saved to cloud storage.

Frequently Asked Questions

Will resetting my Mac remove my Apple ID account?

Yes. A reset erases all user accounts and settings. After the reset, you'll set up the Mac as new and can sign into the same Apple ID or a different one. If you forget your Apple ID password, you can reset it at iforgot.apple.com before you reset the Mac.

Can I reset my Mac if the battery is low?

No. Plug in your Mac and let it charge to at least 50% before starting a reset. If the power cuts out during the erase or reinstall, your Mac may become unbootable and require professional repair. Keep it plugged in throughout the entire process.

How long does a reset take?

The erase itself takes a few minutes, but downloading and installing macOS can take 30 minutes to several hours depending on your internet speed and Mac model. Apple Silicon Macs are generally faster than Intel Macs. Plan for at least two hours and keep your Mac plugged in and connected to Wi-Fi.

What if I want to keep some files but reset everything else?

You don't have to do a full reset. Instead, back up the files you want to keep, then manually delete applications and files you don't need, clear your browser cache, and remove old user accounts. This is faster than a full reset and leaves your system intact. A full reset is only necessary if you need a completely clean installation.

Can I reset my Mac remotely?

No. You must have physical access to the Mac and be able to restart it and enter Recovery Mode. You cannot reset a Mac over the internet or through Find My Mac, though you can erase it remotely as a security measure if it's lost or stolen.