Whether you're selling your Mac, troubleshooting major issues, or starting fresh, resetting macOS is a clean way to restore your device to its original factory state. This process erases all data and reinstalls macOS.
📦 What Does Factory Reset Do?
- Erases your hard drive completely.
- Removes all personal files, apps, and settings.
- Reinstalls a clean version of macOS.
⚠️ Important: Backup First
Before resetting, use Time Machine or a cloud backup to save your data. After the reset, everything on the internal drive will be gone.
🔐 Step 1: Sign Out of iCloud, iMessage, and Apple ID
- Go to System Settings ➝ Your Name.
- Scroll down and click Sign Out.
- Also sign out from iTunes, Messages, and FaceTime.
- This will prevent activation lock for the next user.
💻 Step 2: Boot into macOS Recovery Mode
Depending on your Mac type:
- Intel Mac: Restart and hold
Command + R. - Apple Silicon (M1/M2/M3): Shut down completely, then hold the
Power Buttonuntil you see "Loading Startup Options."
🧽 Step 3: Erase the Disk
- In Recovery Mode, open Disk Utility.
- Select your main disk (e.g., Macintosh HD).
- Click Erase.
- Name it Macintosh HD, choose APFS, and click Erase.
⬇️ Step 4: Reinstall macOS
- Exit Disk Utility and return to the Recovery menu.
- Choose Reinstall macOS.
- Follow the on-screen instructions to install a clean version.
✅ Final Setup
After installation completes, your Mac will restart and show the setup assistant. If you're selling or giving it away, leave it at this screen so the new owner can set it up as their own.
🧠 Tips
- Make sure your Mac is connected to Wi-Fi and power during the entire process.
- Use Erase Assistant (macOS Monterey or later) for faster wiping: go to
System Settings ➝ General ➝ Transfer or Reset ➝ Erase All Content and Settings. - Activation Lock remains enabled if you forget to sign out of iCloud before erasing.
🎯 Conclusion
Resetting your Mac is simple if you follow each step carefully. From iCloud sign-out to reinstalling macOS, ensure you're ready to wipe your device before proceeding. Once reset, your Mac will be as good as new.