Startup modes for M1 Macs

Apple has completely redesigned and reorganised startup modes in M1 Apple Silicon Macs. Instead of having to memorise all the startup key combinations used by Intel Macs, different modes and features are accessed in a structured and logical order. Some, such as Safe Mode, may not be as convenient to access, but follow a logical sequence. Here’s a quick reference.

• Diagnostics Mode
• Recovery Mode
• Fallback Recovery Mode
• Safe Mode
• Startup Manager
• Set default startup volume
• Restore macOS from a previous backup
• Verbose Mode
• Reset SMC/NVRAM
• DFU Mode
• Target Disk Mode
• Single-User Mode

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M1 Macs have another hidden boot mode

However sparse Apple’s documentation might have become, when it does explain things properly, it’s amazing what’s revealed in the detail. One document every serious Mac user should read and refer to repeatedly is the Platform Security Guide, which Apple has just revised to give all the gory details of how M1 Macs start up. In the course of doing that, it reveals that these new models have a boot mode which doesn’t appear to be documented anywhere else, but which could prove a Mac-saver: Fallback Recovery OS.

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