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Only boots to blue screen

Having read through some of the questions here, I think I have a slight variation.

When I boot my 17” MacBook Pro A1151 Snow Leopard 10.6.8, I get;

  • SuperDrive clicks and whirrs
  • Internal Fan starts
  • Boot chime sounds
  • Grey screen with dark grey apple logo and spinning ‘clock’

After about a minute it changes to a blue screen and the black cursor arrow momentarily appears in the top left of the screen.

I then get caught in a loop where it goes;

  • Bright blue screen
  • Dim blue screen
  • Spinning black ‘clock’ at bottom of dim blue screen
  • …repeat (every 10 seconds)

I have left this run for 20 minutes and initially the hard disk is very active. However, this activity eventually stops but the blue screen loop keeps happening.

This Mac is dual boot and I can boot to Windows (XP!) ok and I can also boot to OSX install DVD and run Disk Utility and repair both the disk (Appears OK) and repair the permissions (various permission errors, which it says it has fixed)

It looks like I am so close but still cannot fully boot. Any help would be greatly appreciated!

Bu soruyu yanıtlayın Ben de bu sorunu yaşıyorum

Bu iyi bir soru mu?

Puan 0
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En Yararlı Yanıt

Your integrated GPU may have failed. See if you can boot from an external drive with gfx card status installed on it so you can turn off the GPU

Bu yanıt yardımcı oldu mu?

Puan 1


Wow! thanks for getting back so quickly!

Does the fact that I can boot to Windows ok not indicate that the GPU is ok?


Not really, Windows probably does not have the driver for the dual graphics.


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Richard Osborn sonsuza kadar minnettar olacak.
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