How to Securely Erase and Factory Reset a Mac with Apple Silicon (M1/M2/M3)

The Shift in Mac Wiping Procedures

Before selling, trading in, or giving away a Mac, you must securely erase all your personal data. Historically, on Intel-based Macs, this involved booting into macOS Recovery, using Disk Utility to manually wipe the Macintosh HD volume, and then initiating a lengthy reinstallation of macOS. This process was time-consuming, prone to errors, and intimidating for average users.

With the introduction of Apple Silicon (M1, M2, and M3 chips) and Macs featuring the T2 Security Chip running macOS Monterey or later, Apple radically simplified this process. Because these modern Macs natively encrypt your storage drive out of the box (FileVault), “erasing” the Mac no longer requires overwriting every sector of the hard drive. Instead, the system simply destroys the cryptographic keys that unlock the data, rendering the existing data instantly irretrievable.

The “Erase All Content and Settings” Feature

Apple introduced the Erase All Content and Settings (EACAS) feature to mirror the seamless factory reset experience found on the iPhone and iPad. This tool safely wipes your user data, signs you out of Apple services, removes Touch ID fingerprints, and unpairs Bluetooth devices, all while leaving the core macOS operating system completely intact.

Step-by-Step: How to Factory Reset an Apple Silicon Mac

Prerequisites

• Your Mac must be connected to the internet.
• You must be logged into an Administrator account.
• You will need your Apple ID password to disable Activation Lock.
• Ensure you have backed up any important data via Time Machine or iCloud before proceeding. Once this process begins, data recovery is impossible.

For macOS Ventura and Sonoma (macOS 13 & 14)

1. Click the Apple menu (?) in the top-left corner of the screen.
2. Select System Settings.
3. In the left sidebar, click General.
4. On the right side, click Transfer or Reset.
5. Click the button labeled Erase All Content and Settings….

For macOS Monterey (macOS 12)

1. Click the Apple menu (?) in the top-left corner of the screen.
2. Select System Preferences.
3. With System Preferences open, click System Preferences in the menu bar at the top of the screen (next to the Apple logo).
4. Click Erase All Content and Settings… from the dropdown menu.

The Erase Assistant Process

Once you launch the tool, the Erase Assistant will guide you through the final steps:

1. Authentication: You will be prompted to enter your Mac’s administrator password.
2. Time Machine Prompt: You may be asked if you want to create a final backup. If you already have one, you can click Continue.
3. Review Data to be Removed: The screen will display a summary of what will be erased, including Apple ID sign-outs, Touch ID data, Wallet items, and Find My activation lock.
4. Sign Out of Apple ID: Enter your Apple ID password to disable Find My Mac and Activation Lock. This is a critical security step that ensures the next owner can actually set up the device.
5. Final Warning: Click the red Erase All Content & Settings button to confirm.

What Happens Next?

Your Mac will immediately restart. The screen may go black, and you may see the Apple logo with a progress bar. Because it is only destroying encryption keys rather than writing zeros to the entire drive, this process is incredibly fast, often taking only a few minutes.

The Mac may restart more than once. Eventually, you will be greeted by the “Hello” screen, indicating the Mac is now in its factory default state. If you are selling or giving away the Mac, stop here. Press and hold the power button to shut it down, leaving the initial setup process for the new owner.

Conclusion

Apple Silicon has transformed the daunting task of formatting a computer into a secure, intuitive, five-minute process. By relying on hardware-level encryption rather than software-level disk wiping, macOS guarantees that your personal data is permanently inaccessible before the Mac leaves your possession.