Panic CPU 1 and Cpu 0 errors

Discussion in 'MacBook Pro' started by MontanaJohn, Jun 15, 2016.

  1. MontanaJohn macrumors newbie

    Jun 15, 2016
    MacBook Pro, 2010 vintage, displayed error message about disk or memory full. Not sure which since message lasted only a couple of seconds then system shut down. Apple says to take it to nearest Apple store - that's 4+ hours away. Apple telephone walked me through Power+Shift, did not work; Power& CMD+R, did not work; and Power Shift+Control+Option which did not work

    Start up error screen: upload_2016-6-15_17-2-1.jpeg

    Any ideas on what the problem might be?

  2. JTToft macrumors 68040

    Apr 27, 2010
    Aarhus, Denmark
    The keyboard combinations you mention are a bit confusing.
    Can you boot to recovery mode by holding Cmd + R at the boot chime and until the Apple logo?
    If so, I'd just reinstall OS X from there.
  3. MontanaJohn thread starter macrumors newbie

    Jun 15, 2016
  4. Queen6 macrumors 604


    Dec 11, 2008
    Land of the Unexpected
    On an older Mac with a spinner, first I would do is check the system drive and see if it has any errors. More complex. if the system won't start, slaving it to another Mac (Target Disk Mode) or remove the drive and run externally on another Mac. If you have the original OS X install disks you can boot it of that, or create a USB boot drive if you have access to other machines.

    First on my list would be to boot it from a bootable clone and take it from there, SuperDuper or Carbon Copy Cloner are indispensable.

  5. T'hain Esh Kelch macrumors 601

    T'hain Esh Kelch

    Aug 5, 2001
    1. Boot from something else - External harddrive or DVD.
    2. If 1. works, move internal drive to external cabinet.
    3. If 2. works, get a new SATA cable. If 2. doesn't work, get a new drive.
    4. If 1. doesn't work, send it to a professional or buy a new machine.
  6. MontanaJohn thread starter macrumors newbie

    Jun 15, 2016
    I'll give it a try. Thanks.
  7. grahamperrin, Jun 16, 2016
    Last edited: Jun 18, 2016

    grahamperrin macrumors 601


    Jun 8, 2007
    If you can boot (from any OS X startup volume) in single user mode, run the following command:

    nvram boot-args="-v keepsyms=y"

    Then at the command line:

    shutdown -r now

    Whilst keepsyms=y is in NVRAM, any kernel panic should present something more human-readable in the backtrace.

    Also: the kern_… files at
    – a future kernel panic might show the name of the file and the line number within that file.
  8. grahamperrin macrumors 601


    Jun 8, 2007
    Apologies: in my last post, where I wrote 'exit' I should have written 'shutdown -r now'. Corrected.

    An exit alone (from single user mode, to normal mode) is not enough for the boot arguments to take effect.

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