To start up into Safe Mode (to Safe Boot), do this:
1.Be sure the computer is shut down.
2.Press the power button.
3.Immediately after you hear the startup tone, press and hold the Shift key.
Note: The Shift key should be held as soon as possible after the startup tone but not before.
4.Release the Shift key when you see the screen the gray Apple and progress indicator (looks like a spinning gear).
During the startup, you will see "Safe Boot" on the Mac OS X startup screen (shown below). To leave Safe Mode, restart the computer normally, without holding any keys during startup.
Knowledge Base Articles
These troubleshooting articles can be searched from http://www.apple.com/support.
106692 Mac OS X: Troubleshooting Installation and Software Updates
106693 Mac OS X: Troubleshooting Installation From
General Information | PowerBook G4 |