Suppose a software update or an app you installed has corrupted system files and as a result your Mac refuses to start up properly, what do you do?
Those who have planned ahead and created a bootable USB install disk for El Capitan can do a clean install of macOS, and then restore their Mac from the most recent Time Machine backup.
But there's a better way to deal with such situations. In this tutorial, we'll educate you on booting into macOS' Recovery Mode and using the built-in recovery tools to restore your Mac from a Time Machine backup.