Macworld macOS Recovery (often referred to as Mac Recovery Mode) was introduced back in 2010 with OS X 10.7 Lion. This Recovery HD partition contains the latest version of the macOS you installed on your Mac and makes it possible to troubleshoot issues with your Mac. It is a useful tool that the majority of Mac users will never need to use, unless one of the following applies: You need to wipe a Mac because you want to sell it or pass it on to a new user. macOS Recovery will allow you to wipe your Mac, removing your data and your Apple ID. We have a detailed tutorial on how to wipe your Mac an…