Apple imac shuts down out of the blue

Grey screen Pops up with text saying that it will restart has the power icon in the background?

Hi p,
Is this while running on battery power?
If low battery is not the issue, try resetting the SMC:
http://support.apple.com/kb/HT3964

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  • Shuts down out of the blue

    when restarted, the clock is back to year 2000 and the wi-fi connection out. any clues?

    Hi p,
    Is this while running on battery power?
    If low battery is not the issue, try resetting the SMC:
    http://support.apple.com/kb/HT3964

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    I thought it must certainly be hardware issue but what? I have checked all temps, reset firmware, etc etc.....
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    I've experiencing the same problem.
    If there is a power failure (or the power line gets disconect) I have to unplug everything from the back of the computer and wait for hours till I can turn it back on.
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    hendry17 wrote:
    Is that similar with this article http://support.apple.com/kb/ht1553 on 'Instruction for backing up to an external hard disk via Disk utility' ?
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    Ds store: I read your article on creating a data recovery.
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    Mac's have been shutting off ports that are drawing too much current, like what port powered hard drives do.
    Am planning to get myself a 3TB external HDD 3,5" for all my backups in time for my AASP journey
    Too large for a boot drive, you basically want a external boot drive equal too or slightly larger than the boot drive your recovering from, because later you can use it as a bootable clone backup of the entire boot drive and store it for emergencies.
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    Sure you can partition, but I don't advise having so many backups on one piece of physical media, you drop it, lose it or fry it, you lost everything.
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    https://discussions.apple.com/community/notebooks/macbook_pro?view=documents

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    Hello,
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    Thanks for visiting Apple Support Communities.
    If your iMac shut down unexpectedly, and the fan is running unusually fast or loud, you may need to reset the System Management Controller.
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    Intel-based Macs: Resetting the System Management Controller (SMC)
    http://support.apple.com/kb/HT3964
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    Jeremy

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