This can give you a feeling of operating a new Mac.ħ Things You Need to Do Before Erasing Your Mac Factory resetting your Mac reinstalls a clean and new version of macOS. Therefore, factory resetting your Mac is the best way to prepare it for a new owner.Īlso, if your Mac starts to misbehave, you might need to factory reset it to freshen it up. In this world of online privacy, no one wants their information at the fingertips of another person other than them. The major reason anyone would want to reset their Mac is if they are ready to sell it or swap it with another. Why Do You Need to Factory Reset Your Mac? How to Factory Reset Mac Using Disk Utility?.Erase your hard drive and reinstall macOS.Unpair Bluetooth devices you intend to retain (optional).Sign out of iTunes in macOS Mojave or earlier.7 Things You Need to Do Before Erasing Your Mac.Why Do You Need to Factory Reset Your Mac?.