Mac Booting with Prohibitory sign

Discussion in 'Mac Basics and Help' started by Klaymator14, Nov 15, 2009.

  1. Klaymator14 macrumors newbie

    Joined:
    Jul 26, 2009
    #1
    Hello all, after about a week of using Snow Leopard, whenever I restart my mac, it starts up with a prohibitory sign, or a circle and a line through it. So then I have to reinstall Snow Leopard, and whenever I restart it after that, it always does it. But it won't do it if I restart it after a software update, specifically OS updates. This didn't fix it when 10.6.2 came out, and it's very frustrating. Anyone know what's wrong?
    Thanks!

    -Blayke :)
     
  2. Sun Baked macrumors G5

    Sun Baked

    Joined:
    May 19, 2002
    #2
    Utility/Disk Utility/Repair Permissions

    and for good measure verify the drive while there.

    and then try

    System Preferences/Startup Disk ... reselect the startup Disk

    The zap PRAM on restart (Press and hold the Command-Option-P-R keys on restart, let it bong three times and release).

    ---

    Permissions sometimes get out of whack after a system update, install ... if the startup disk isn't registering properly, it can cause a few issues on restart ... zapping PRAM makes sure all startup items in PRAM are reset.
     
  3. Klaymator14 thread starter macrumors newbie

    Joined:
    Jul 26, 2009
  4. otter870 macrumors newbie

    Joined:
    Mar 2, 2009
    Location:
    Ohio
    #4
    same problem here

    I am having the same problem and have done all these fixes and even a complete erase and reinstall and it is still doing it.... i would love to know what is causing this... could it be hardware related?
     

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