A factory reset on a MacBook wipes the device of all personal data and reinstalls a clean, unimpeded version of macOS. Thankfully, completing a factory reset on a MacBook is painless.

You can—and should—reset your Mac back to factory settings before you sell it off. And, if your Mac isn't functioning well or is frozen, there's a way to reset it back to factory settings ...

Resetting your SMC on your MacBook can be a common fix for a lot of common problems, but it's not obvious how to do so. Here's the steps you need.

For a MacBook, starting over would be a factory reset. A factory reset is exactly what it sounds like: erasing everything in order to restore a MacBook to how it would have been leaving the factory.