Mac Recovery Mode
Recovery mode is a small separate macOS that lives on your drive. It's how you reinstall, repair a disk, restore a backup or reset a password when the main system won't cooperate.
Getting in
Apple silicon (M1 and later)
Shut down completely. Then press and hold the power button until you see "Loading startup options". Release, click Options, then Continue.
Holding Command-R does nothing on these machines. It's the power button, and it needs a full shutdown first rather than a restart.
Intel Macs
Restart and immediately hold Command-R until the Apple logo or a spinning globe appears.
Two variants are worth knowing. Command-Option-R starts Internet Recovery and installs the latest macOS your Mac supports. Command-Shift-Option-R installs the version that shipped with the machine, which is useful for a Mac you're selling.
What's in there
Restore From Time Machine Backup
Rolls the whole system back to a previous state from an external Time Machine drive. This is a full-system restore rather than a way to grab individual files, so it replaces what's currently on the disk.
Reinstall macOS
Installs a fresh copy of the operating system over the top, leaving your files and applications where they're. It's a reasonable step for a system that's misbehaving in ways you can't pin down. It's not a factory reset, and it won't remove your data.
Safari (or Get Help Online)
A stripped browser so you can look up an error message on the machine that's broken. It can't install extensions and won't keep history.
Disk Utility
Where you run First Aid against a volume, or erase a drive during a factory reset. Run First Aid on the container as well as the volume when you're chasing disk errors, since they're separate checks.
Terminal, under the Utilities menu
Full command line access. This is where resetpassword lives, covered in forgot your Mac password. It's also how you check disk state with diskutil list when Disk Utility's interface is being unhelpful.
What Recovery mode can't do
It can't decrypt a FileVault volume without credentials. You'll be asked to unlock the disk before you can see anything on it, and no tool in Recovery bypasses that.
It also can't rescue a physically failing drive. If First Aid keeps failing and the machine won't boot, you're looking at a hardware problem, and every further attempt risks the data you haven't copied off yet.
Startup key combinations worth knowing
These are Intel-only. On Apple silicon everything routes through the power button and the startup options screen.
- Shift for Safe Mode, which loads a minimal system and clears some caches. A good diagnostic when something is crashing at login.
- D for Apple Diagnostics, a hardware test.
- Option to pick a startup disk.
- Command-Option-P-R to reset NVRAM, which occasionally fixes display and volume oddities.
Safe Mode exists on Apple silicon too. Hold the power button to reach startup options, then hold Shift while selecting your disk and click Continue in Safe Mode.
Fix it before it becomes a Recovery mode problem
Most reasons people end up in Recovery start as a full disk or a misbehaving background agent. CleanMachine surfaces both, along with disk health and startup items, in a free scan.
↓ Download Free & ScanWhen to reach for it
Recovery is the right tool when the main system won't start, when you need to erase the startup disk you're currently booted from, or when you're resetting a password you can't reset any other way.
It's the wrong tool for a Mac that boots fine and merely feels slow. That's a diagnosis problem, not a repair problem, and reinstalling macOS to fix it is a lot of effort for something usually caused by a nearly full disk.