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blue to black screen at boot up.

133 Views 1 Reply Latest reply: Dec 2, 2012 4:57 PM by Grant Bennet-Alder RSS
dan510iel Calculating status...
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Dec 2, 2012 4:44 PM

I'm running 10.6.8 Mac Pro and getting blue to black screen at boot up. I am only able to log in by safe mode only, please help...

Mac Pro, Mac OS X (10.6.8)
  • Grant Bennet-Alder Level 8 Level 8 (48,180 points)
    Currently Being Moderated
    Dec 2, 2012 4:57 PM (in response to dan510iel)

    Do you get:



    gray screen

    Dark Apple


    Spinner spins for the usual amount of time

    screen goes blue or black at the point where you would normally login?



    That is exactly when the graphics card is shifted to automatic. Although that also is the point when added kernel extensions have been loaded and are made active, users report this symptom often correlates with graphics card failure.


    Safe Mode does not use the driver or automatic mode, so being able to operate in Safe Mode adds credence to graphics card failure.

    Mac Pro (Early 2009), Mac OS X (10.6.8), & Server, PPC, & AppleTalk Printers


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