Stuck at white screen while installing Mountain Lion [NEED HELP]

Discussion in 'Mountain Lion Desktop Support' started by zanderp, Jul 27, 2012.

  1. zanderp

    zanderp

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    Jul 27, 2012 at 5:52 AM #1
    zanderp

    zanderp

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    I'm trying to install Mountain Lion on my build. (Gigabyte GA-Z68X-UD3H-B3, AMD Radeon HD 6850, Intel Core i5-2500K) I've followed all the steps correctly with running unibeast with my copy of ML downloaded from the app store, however I get stuck at a blank white screen after booting my usb drive. I've seen this issue posted on here, however haven't found a fix for it. Anybody have any pointers?????
     
  2. stevenz

    stevenz

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    Jul 27, 2012 at 5:55 AM #2
    stevenz

    stevenz

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    Is that after the bootmenu or is it not even getting that far?

    If it's after the bootmenu, then try putting in a

    -v

    to get more boot details and hopefully something obvious.
     
  3. zanderp

    zanderp

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    Jul 27, 2012 at 6:08 AM #3
    zanderp

    zanderp

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    Yes, it's after the boot menu. I've tried the -v, and -x, and "GraphicsEnabler=no" and all of those. All lead me to the same white screen after the apple logo loads.
     
  4. clamster

    clamster

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    Jul 27, 2012 at 6:11 AM #4
    clamster

    clamster

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    after the apple logo appeared, i got the white screen and cursor on my radeon 6870
    i disabled the discrete graphics card in bios and used the built in graphics on the mobo during install

    others removed the discrete card during install of ML
     
  5. kurosagi

    kurosagi

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    Jul 27, 2012 at 6:45 AM #5
    kurosagi

    kurosagi

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    Hi , you can check on below post. I have same problem with you. After follow that step, no more white screen problem :)

    http://www.tonymacx86.com/mountain-...mountain-lion-6xxx-gpu-issues-fix-inside.html
     
  6. Asus-Freak

    Asus-Freak

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    Jul 27, 2012 at 6:46 AM #6
    Asus-Freak

    Asus-Freak

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    Don't need to remove the card, just go into bios and select the onboard video as default...
     
  7. DihydrogenMonoxide

    DihydrogenMonoxide

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    Jul 27, 2012 at 6:49 AM #7
    DihydrogenMonoxide

    DihydrogenMonoxide

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    And don't forget to switch your cable... Helps mightily with getting the monitor to show something.
    Not that I speak from experience.
     
  8. Asus-Freak

    Asus-Freak

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    Jul 27, 2012 at 6:50 AM #8
    Asus-Freak

    Asus-Freak

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    :clap: :clap: :clap: Good point...
     
  9. mkaen

    mkaen

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    Jul 27, 2012 at 6:52 AM #9
    mkaen

    mkaen

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    And for those of us with only discrete graphics? Any suggestions?

    I'm using a CustoMac 2010 (X58A UD3R mobo, radeon 6770 graphics) and keep getting white screen with some faint flickering dotted lines in the middle... Tried booting with "-x" and "GraphicsEnabler=No" but get the same screen.
     
  10. straycat264

    straycat264

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    Jul 27, 2012 at 7:01 AM #10
    straycat264

    straycat264

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    This approach worked for me for an XFX 6870. Might be worth a shot for you.
    http://www.tonymacx86.com/mountain-...deo-card-compatability-list-2.html#post390856
     

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