Learn how to start up Mac OS X 10.2 or later in Safe Mode.
To start up into Safe Mode (to "Safe Boot"), do this:
- Be sure the computer is shut down.
- Press the power button.
- Immediately after you hear the startup tone, press and hold the Shift key.
Tip: The Shift key should be held as soon as possible after the startup tone but not before.
- Release the Shift key when you see the gray Apple and progress indicator (looks like a spinning gear).
During the startup in Mac OS X 10.2 through 10.3.9, you will see "Safe Boot" on the Mac OS X startup screen.
During the startup in Mac OS X 10.4 or later, you will see "Safe Boot" on the login window, which appears even if you normally log in automatically.
"Safe Boot" can take up to 5 minutes to action
To leave Safe Mode in any version of Mac OS X, restart the computer normally, without holding any keys during startup.