My Mac Mini will not boot !... -:((

Discussion in 'Mac mini' started by mafaky, Jan 22, 2015.

  1. mafaky macrumors regular


    Jun 12, 2014
    Istanbul, Turkey
    I had upgraded my Mac Mini to Yosemite, a while ago and running without any problems till today.

    Now it doesn't boot up at all. I removed all peripheral cables (except the monitor), turned off the Mini, waited for 30 seconds or so, turned on (push the switch at the back corner) again, and as soon as I hear the startup sound start pressing the Shift key. First I get a totally blank grey screen. After 15-20 seconds the monitor changes to the black screen and I get the prompt: "no boot device available -- insert boot disc and press any key"

    What's the remedy?

    Thanks for the assistance as I'm still a newbee at Mac/OS X.

  2. Fishrrman macrumors P6


    Feb 20, 2009
    1. Power down (all the way off)
    2. Reboot
    3. As soon as you hear the startup sound, hold down the option key and KEEP HOLDING IT DOWN.
    4. In a few moments, the startup manager should appear.

    What choices does it give you?
  3. ApfelKuchen macrumors 68030

    Aug 28, 2012
    Between the coasts
    There are several possible causes, hence several possible solutions.

    So far, you've followed the first two steps found in - The next step? Reset the NVRAM -

    If that doesn't resolve, then switch to another document - - Boot to Recovery, then use Disk Utility to test the HDD

    If the system can't find a boot device, it means there could be something wrong with either the system's ability to locate the hard drive, or the hard drive itself.

    Resetting NVRAM addresses the system's ability to locate the hard drive, Disk Utility will diagnose problems with the hard drive.
  4. h9826790 macrumors G5


    Apr 3, 2014
    Hong Kong
    Did you choose Windows (bootcamp) as your start up disk?

    If yes, perform a PRAM reset, that will bring you back to OSX.

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3 January 22, 2015