Cannot boot from USB on 2009 MBP

Discussion in 'MacBook Pro' started by RRmalvado, Sep 28, 2012.

  1. RRmalvado macrumors 6502

    Joined:
    May 27, 2010
    #1
    I am trying to clean install Mountain Lion on a Mid-2009 MBP (http://www.everymac.com/systems/app...3-mid-2009-sd-firewire-800-unibody-specs.html)

    However when I attempt to boot from USB by holding down the Option button I only see the Macintosh HD and the Recovery partition for Lion. If I unplug and replug in the USB drive the computer freezes, as in I cannot select any drive to boot from using the trackpad or the keyboard. If I unplug again I get the little poof cloud, sorta like when removing a shortcut from the Dock.

    I have tried SMC (http://support.apple.com/kb/HT3964) and NVRAM/PRAM (http://support.apple.com/kb/HT1379) and rebuilding the USB key using Lion Diskmaker.

    With the same USB drive I updated my MBA to Mountain Lion early this afternoon.

    Any thoughts?

    Thanks.
     
  2. fleawannabe macrumors regular

    Joined:
    Dec 16, 2011
    #2
    I had problem like this as well, try this. Hold option like normal, select your regular Mac HD, then before you log in restart the Mac. Now hold option again like you did the first time and your external SHOULD be there. Good Luck.
     
  3. RRmalvado thread starter macrumors 6502

    Joined:
    May 27, 2010
    #3
    With the USB drive inserted from the beginning?
     
  4. fleawannabe macrumors regular

    Joined:
    Dec 16, 2011
    #4
    Yes
     
  5. RRmalvado thread starter macrumors 6502

    Joined:
    May 27, 2010
    #5
    After restarting, it now freezes right before the Macintosh HD is fully visible looks transparent still.

    I left it alone for a few minutes and then it finally loaded but the USB drive was visible for about 2 seconds and the went away in a puffy cloud.
     
  6. fleawannabe macrumors regular

    Joined:
    Dec 16, 2011
    #6
    Um, that's odd. Hopefully you figure it out.
     
  7. fleawannabe macrumors regular

    Joined:
    Dec 16, 2011
    #7

    This is pretty intensive but, could you:
    1)Have a friend with a Mac Clone his hard drive to an external.
    2)Reinstall his HD
    3)Upload your HD from your has external to his fresh Mac
    4)Hook up your Mac to his Mac and do Migration Assistant(getting your info)
    5)Then have him put is info back on his from his external.

    Would that work as a last resort?
     
  8. Mr MM macrumors 65816

    Mr MM

    Joined:
    Jun 29, 2011
    #8
    you have to modify the plist in the bootcamp app.

    you need to add support for usb boot for the model that you have, its quite simple to do that.
     
  9. RRmalvado thread starter macrumors 6502

    Joined:
    May 27, 2010
    #9
    I went in another route, I burned Mountain Lion to a DVD and installed it from that. The install went without a hitch.

    Thanks everyone for your help.
     

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