7 Replies Latest reply: Aug 17, 2010 7:27 AM by Yonidass
Oreocracker Level 1 Level 1 (5 points)
My MacPro shuts down and restarts. What is happening? Any suggestions?

MacPro, Mac OS X (10.6.2), 3.2GHz
  • 1. Re: Mac Pro shutting down & restarting often.
    Allan Eckert Level 8 Level 8 (41,525 points)
    Impossible to answer with information provided.


    ___________________

    Allan
    tiger
  • 2. Re: Mac Pro shutting down & restarting often.
    Oreocracker Level 1 Level 1 (5 points)
    What more would you need? I start it, after a few minutes it just restarts itself, several times. I wrote a post above about repairing permissions. Maybe that will help?
  • 3. Re: Mac Pro shutting down & restarting often.
    The hatter Level 9 Level 9 (58,885 points)
    No. Do it but repairing permissions doesn't need to be redone except after installing something maybe. And even that seems like a weakness in Mac OS.

    No, it could be driver for printer, printer, USB cable or device, small UPS...
  • 4. Re: Mac Pro shutting down & restarting often.
    Oreocracker Level 1 Level 1 (5 points)
    I haven't changed anything, but I'll download the latest. Thx.
  • 5. Re: Mac Pro shutting down & restarting often.
    Oreocracker Level 1 Level 1 (5 points)
    It started shutting itself down again & rebooting after being on a few minutes at start up. It sounded like it was laboring to reboot. Like a car engine trying to start. Once it's rebooted and stays on, it stays on all day. Even if I shut it down and come back to it. It only has this peculiar behaviour on the first boot of the day. I'm perplexed and would love some input.
  • 6. Re: Mac Pro shutting down & restarting often.
    steveaps Level 1 Level 1 (0 points)
    Hi i had the same problem with my early 2009 mac pro it would reboot itself intermitantly, sometimes working for days at a time and then all of a sudden it would reboot itself, after months of trying to suss it out it went back to the apple store for repair, a new psu sorted it.
  • 7. Re: Mac Pro shutting down & restarting often.
    Yonidass Level 1 Level 1 (5 points)
    I'm having a similar problem. Will stay on all day and then suddenly, like this morning, it just restarts while surfing the web with no other apps open. No kernel panic or freezing, just a restart. And sometimes when it restarts, it starts to loop right after I hear the fans, restarting over and over.

    What seemed to start it, though, is that I accidentally jarred the desk that the computer is sitting on and it instantly shut down. I didn't shake the computer much at all but apparently it was enough to shut it down. I'm not sure if this was coincidence, or because of a faulty PSU. Since then this is has happened 5 or 6 times. The only other time I jarred this machine in the past I got a kernel panic (more than a year ago).

    Oreocracker, did you end up having to replace the Power Supply unit?