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.
recoveryOS
What do you do if you can’t start your Apple silicon Mac in Recovery? Try Fallback Recovery, as explained in detail here.
Soon M1 Macs will be able to boot from two major versions of macOS, and with new models coming, users are going to have more complex systems. How will Recovery cope?
Terminal in Recovery on an M1 Mac has access to many valuable command tools, including USB-C diagnostics,options otherwise unavailable in csrutil, and more.
Erase your M1’s internal storage in Recovery, reinstall macOS and you could see an error in which it failed ‘to personalize the software update’. That’s not easy to fix, as explained here.
Recovery on an M1 Mac runs from its own container, which should improve its robustness. It has one simple entry point, and offers a full range of facilities in an integrated environment. It’s a big step forward.
How your M1 Mac starts up in the Recovery mode of your choice, or when it decides you need to take a trip to Recovery to fix an issue.
There’s 1 True Recovery, Fallback Recovery and one other recovery mode. Disambiguation, explanation and how this changed in macOS 11.4.
What are a new kernel extension and a private framework doing in macOS 11.4? Here are some details, and suggestions for further research.
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