Recovery reinstall, using an Installer app, or a bootable installer, or with an Apple silicon Mac in DFU mode? What the choices are, and how best to do it.
restore
How well can Time Machine back up other volumes, such as those on external drives? Can it restore them when the original disk fails or goes missing?
How should you restore a whole volume, or an old version of a document to a different folder? Includes details of backup structure.
When should you put your Mac into DFU mode, hook it up to another Mac running Configurator, and revive or restore it?
What should you do if a firmware update goes wrong? Here’s a guide to avoid panic, whether your Mac is Intel, has a T2, or M-series chip, and for Studio Displays.
If there’s a problem, you may try Recovery mode. What do you do when that proves to be a problem? Solutions for Intel and Apple silicon Macs.
When Time Machine makes its backups to APFS storage, just what can and can’t you do? How can you prevent large temporary files from stealing space on storage?
What would happen to a Mac’s firmware if you installed Monterey beta to its internal or external disk? Could that be reversed?
Whether it’s a beta of macOS 12, 11.5, or even a release upgrade, installing it is a risk. Here’s how to mitigate disaster by rolling back to a previous release.
macOS updates sometimes don’t work out right. What can you do to revert to the previous release? Did I hear you mention snapshots?