Graphics hiccup at startup?

Discussion in 'macOS' started by applefan289, Aug 27, 2010.

  1. applefan289 macrumors 68000

    Joined:
    Aug 20, 2010
    Location:
    USA
    #1
    Unless I reset the NVRAM, there is a screen hiccup at startup. Right after the Apple logo, but right before the blue screen, there is a graphics glitch where there are a bunch of gray lines/marks for a second, then it starts up normally. Could this be a virus? It goes away after resetting the NVRAM. I did a clean install of OS X Snow Leopard to see if it would go away, but it's still there. I don't want to reset the NVRAM again because I don't like how the computer starts up at a bright setting.
     
  2. Grannyville7989 macrumors 6502a

    Grannyville7989

    Joined:
    Aug 2, 2010
    #2
    I have had this problem also. But I noticed it after I downgraded from Snow Leopard to Leopard. Every so often, whenever I started up Leopard, I would get graphic glitches all over my screen after the Apple Logo boot screen but before it reached the Leopard desktop.

    However, I never seemed to come up whenever I booted into Windows 7 and since upgrading back to Snow Leopard, I haven't experienced the glitch since.
     
  3. applefan289 thread starter macrumors 68000

    Joined:
    Aug 20, 2010
    Location:
    USA
    #3
    Interesting - it happens to me every single time! I checked my entire system using Techtool deluxe, and everything's fine.
     

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