Mac Booting with Prohibitory sign

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

  1. Klaymator14 macrumors newbie

    Jul 26, 2009
    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?

    -Blayke :)
  2. Sun Baked macrumors G5

    Sun Baked

    May 19, 2002
    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

    Jul 26, 2009
  4. otter870 macrumors newbie

    Mar 2, 2009
    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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