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How do I fix the prohibited sign after logging in?

I have a MacBook Pro that will turn on and allow me to input my password at the log in screen, but after putting in the correct password, after a minute or so I get the prohibited sign. How do I fix this? I can not find the OS cd, and I opene it in safe mode and ran a dianostic of the hard drive and it tells me the mapping is okay.

MacBook Pro

Posted on Jul 22, 2013 11:31 AM

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How do I fix the prohibited sign after logging in?

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