
This tutorial covers entering Recovery Mode and taking advantage of it to erase, install or reinstall the latest version of macOS that was previously found on your Mac.

Invoked at boot time, Recovery Mode helps you check your connected disks for errors, get help online and reinstall macOS. In helping take the pain out of reinstalling macOS, Apple has included so-called Recovery Mode in macOS. As you may have guessed, not many people take that extra step. Reinstalling macOS is a piece of cake provided you have created a USB install disk for El Capitan to begin with. And should your computer exhibit issues preventing it from starting up properly, reinstalling macOS will bring it to perfect working order.

Before selling your Mac, it’s always a good idea to wipe its startup disk clean and then erase your computer and reinstall macOS.
