How to use Mac Recovery Mode

Whether you are wiping your Mac because you are selling it, trying to troubleshoot start up issues, attempting to fix a problem with your disk, hoping to revert to an older version of macOS, or trying to restore from a Time Machine back up, you will need to use the Mac Recovery Mode - here's how to do that. We also look at the various key combinations required, how to use the Recovery HD, how to boot from Recovery over the internet, and how to find things like Terminal once you are Recovery Mode.