Here's how to automatically or manually back up your data, and then restore it on your Mac using Apple's Time Machine feature ...

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.

So here's the backstory - I have a 2005 PowerBook G4 (my computer) and a 2009 white MacBook (my wife's). The PowerBook is really starting to show its age - it's sluggish, has almost no free space ...

Video: Upgrade the M4 Mac mini from 256GB to 2TB Subscribe to 9to5Mac on YouTube for more videos Backup your Mac Before you do anything, be sure to back up your Mac’s current SSD using Time Machine.

Because Time Machine maintains an active state on volumes it uses, you may need to disable Time Machine (in System Settings > General > Time Machine) in order to repair a backup volume.