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Q: Pad lock on screen
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Sep 28, 2014 10:58 AMby Allen A,Hello ScottiePhil,
The lock on the screen indicates that a firmware password has been setup on the system. Choosing an alternative startup disk at boot cannot be done without supplying the firmware password that was configured on the system.
Setting up firmware password protection in Mac OS X
http://support.apple.com/kb/HT1352Cheers,
Allen
