Selling your Mac mini? Whether you're upgrading to the latest M4 Pro or switching to a different setup, properly wiping your machine is crucial. Skip steps here and you might hand over personal files, saved passwords, or worse. Here's how to do it right.
Back Up What You Need First
Before nuking anything, grab what you want to keep. Time Machine is solid for full system backups, but if you're switching platforms or just want specific files, manually copy important folders to an external drive. Don't forget:
- Documents and creative projects
- Photos and videos not already in iCloud
- Application preferences and license files
- Any local email or messages not synced to the cloud
Pro tip: Check your Desktop and Downloads folders. These are data graveyards where important stuff hides.
Sign Out of Everything
This step prevents headaches for both you and the buyer. Start with the big ones:
- iCloud: System Settings > Apple ID > Sign Out. This removes the Mac from Find My and deauthorizes purchases.
- iTunes/Music: Account > Authorizations > Deauthorize This Computer
- Creative Cloud, Office 365, and other subscription apps with device limits
Also hit up any password managers, cloud storage apps, or work VPNs. Basically, if it required a login, sign out.
Use Disk Utility for Secure Erase
macOS Recovery is your friend here. Restart while holding Command + R to boot into Recovery Mode. Once there:
Open Disk Utility and select your startup disk (usually "Macintosh HD"). Click Erase, choose "Mac OS Extended (Journaled)" or APFS depending on your setup, and hit the Security Options button. Choose "Most Secure" for the full cryptographic wipe.
This process takes time but actually overwrites data instead of just marking it as deleted. On modern SSDs with encryption enabled (which is default), even the fastest option is pretty secure, but why risk it?