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.
1 True Recovery
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.
macOS 11.4 brought major changes to the way M1 Macs handle external bootable disks. This explains how this works during the boot process.
There’s 1 True Recovery, Fallback Recovery and one other recovery mode. Disambiguation, explanation and how this changed in macOS 11.4.
How an M1 Mac can start up from an external bootable disk, and how that can fail. All about boot security policy, and how that’s applied.
How changing a volume’s boot policy can let you boot in older macOS, and update, if you wish. For anyone who uses external bootable disks with an M1 Mac.
If you’re considering getting an M1 Mac, or already have one, this new book is an essential guide and reference.
Although generally reliable in normal macOS and in Recovery, First Aid sometimes runs into problems with external bootable disks.
You may encounter this when trying to boot into Fallback Recovery Mode. Currently it doesn’t appear to be fully functional, and doesn’t help.
Created when you update macOS, its Fallback Recovery OS is made from the previous Recovery OS. Here’s how to check whether it’s available on your M1 Mac.
