How to Use Time Machine to Backup Any Mac Time Machine is an app that comes with every Mac. It’s designed to help you back up everything on your Mac. It literally mirrors your Mac’s internal ...

Backing up your Mac is not just something you do when testing betas like macOS Tahoe; it is an everyday essential if you want to avoid risking losing irreplaceable work.

Be sure to back up your Mac using Time Machine before installing the software using the method, otherwise you won't be able to revert back to the previous version of macOS if things go wrong.