Macbookpro letterbox display at startup

Discussion in 'MacBook Pro' started by tiger2, Dec 14, 2012.

  1. tiger2 macrumors member

    Joined:
    Sep 8, 2012
    #1
    i have a 2012 macbook pro running latest osx. in order to give a presentation to parents at school i booted the computer while connected to an lcd projector with a different resolution (800 x 600, i think) than the macbook. now, whenever i boot the macbook it has black letterboxes on either side of the screen.

    the first time i booted it after the presentation i had to switch the resolution back to 1680 x 1050. once the computer gets past the apple logo and that circular rotating dash thing, it reverts to 1680 x 1050 and the letterboxes go away, but for some reason it bugs me.

    is there a way to stop it from doing this?

    thank you for your time!
     
  2. justperry macrumors 604

    justperry

    Joined:
    Aug 10, 2007
    Location:
    In the core of a black hole.
    #2
    You might try clearing the PRAM, hold Command-Option-P-R on startup and release after you hear the startup sound 3 times.
     
  3. tiger2 thread starter macrumors member

    Joined:
    Sep 8, 2012
    #3
    It worked!

    Thank you very much!
     
  4. justperry macrumors 604

    justperry

    Joined:
    Aug 10, 2007
    Location:
    In the core of a black hole.
    #4
    No worries

    If you have problems like these first thing you think about is resetting PRAM or SMU, or resetting permissions.
    In this case I though it was obvious (for me) to reset the PRAM since you got it at startup but vanished after login.
     

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