USB Boot drive or Boot DVD don't show up on Mac Pro

Discussion in 'Mac Pro' started by sebh, Aug 12, 2015.

  1. sebh macrumors member

    Joined:
    Jan 9, 2015
    Location:
    munich
    #1
    Hi,

    i update my Mac Pro 2010 from 10.10.3 to 10.10.4 after restart it dosn't boot anymore into osx it just restart after a while. So i want to boot from a USB Boot drive with 10.10.4 on it. But the Drive dosn't show up when i hold alt at start up. The same when i try it with a boot dvd. i have also tried the Drive with my Mac Book Pro Retina there it was no Problem to Boot with the USB Stick.
    I did a PRAM resett but same result no USB Boot Drive.
    Now i don't know what i can do to reinstall OSX or repair it.
     
  2. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #2
    Remove all HDD and try again? Of course just for testing purpose.

    Also, did you connect the USB drive to the native USB port?

    Did you use the internal SuperDrive to read the DVD?
     
  3. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
  4. sebh thread starter macrumors member

    Joined:
    Jan 9, 2015
    Location:
    munich
    #4
    no recovery partition that's why i have to do it with usb.
    yeah i tried all usb ports and for the dvd the internal drive.
     
  5. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #5
    Just to confirm that you still get the boot manager by holding "option" during boot, but just no selection for the DVD or USB drive?

    Hold "C" during boot also doing nothing?
     
  6. sebh thread starter macrumors member

    Joined:
    Jan 9, 2015
    Location:
    munich
    #6
    boot manager is there.
    i haven't tried holding c i give it a try later.
     

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