What to try if your Mac doesn’t enter Recovery Mode when you want it to. For Apple silicon Macs, there’s Fallback Recovery, while Intel Macs have two forms of internet or remote recovery to choose from.
recovery
Can be a Mac-saver if you have problems when your backup storage isn’t available. You don’t need to run Time Machine to make them, and can roll back in Recovery, as shown here.
Introduced 15 years ago, what was originally a Recovery partition has become complex in Intel Macs, and completely different in Apple silicon, with a fallback.
How to use Share Disk in Recovery on an Apple silicon Mac, how fast it can be. Target Disk Mode on Intel Macs, and some less likely alternatives.
How Software Update settings obtains a list of available updates, and the variants that should contain. How mobile asset catalogues are checked, and preparations made to download the update.
What do you do if you can’t start your Apple silicon Mac in Recovery? Try Fallback Recovery, as explained in detail here.
How to erase just the Data volume, the whole Boot Volume Group, all volume’s in the Mac’s visible container, or the entire internal SSD.
Catch up on your reading with selected articles from the past year, covering hardware, firmware and Recovery, troubleshooting and updates.
Systematic and thorough account of the structure and function of bootable external disks and dual-boot systems from High Sierra to Sequoia, and how to diagnose their problems.
Working with external bootable disks: how to create and add them, ownership and LocalPolicy, how that can be changed, and what happens with errors and failure.
The Eclectic Light Company 