
Step 4: Click ‘Erase’ and select APFS as the file system format. For non-startup disk or volume, go to Finder > Applications > Utilities > Disk Utility. When you are selling, donating, or dumping your old Mac hard drive, back up the drive's data then wipe your drive by using Disk Utility's secure erase feature. How to Fully Wipe Mac Hard Drive When Selling It - AppleToolBox.Įrase Mac Hard Drive by Using Disk Utility.



So I opened Disk Utility planning to delete all files. But I want to make sure all personal data is off it first. Give it to a school if anyone wants it or just trash it in an enviro-friendly way. So normal things often didn't work as expected. The friend had a small tech business and he would do all sorts of weird things to his Macs. My daughter had a Mac laptop that was given to her by a friend a long time ago.
