How do I boot my Mac into Safe Mode?
Safe mode can be a useful tool when troubleshooting issues on your Mac.
It disables any services or startup items that run on your Mac automatically when you log into your user account.
It disables any third-party drivers (like scanner drivers).
If a behavior in a program is reproducible in a regular boot but not in safe mode, the behavior might be related to one of the following:
Device Drivers, like scanner drivers.
Third-party services or extensions that automate tasks or enhance user experience in Mac OS.
Third-party plugins, such as contextual menu items or toolbar buttons.
Steps to Boot your Mac into Safe Mode
To boot your Mac into safe mode, follow these steps:
Restart your Mac. If it is already shut down, start it up.
Immediately after you hear the startup tone, press and hold the Shift key.
Release the Shift key when you see the gray Apple and progress indicator (looks like a spinning gear).
Tip: The Shift key should be held as soon as possible after the startup tone but not before.
If you use the login screen on your Mac, "Safe Boot" will display on the startup screen.
Returning from Safe Boot
To leave Safe Mode, restart the computer normally, without holding any keys during startup.