Can't boot into OS X

Discussion in 'Mac Basics and Help' started by n8236, Dec 27, 2009.

  1. n8236 macrumors 65816

    Joined:
    Mar 1, 2006
    #1
    Any reason why I can't boot into OS X while I have my Firewire/USB external hard drive plugged in? I've had my UMBP for over a year and this hasn't happened up until recently.
     
  2. harry*333 macrumors 6502a

    harry*333

    Joined:
    Jul 24, 2009
    #2
  3. spinnerlys Guest

    spinnerlys

    Joined:
    Sep 7, 2008
    Location:
    forlod bygningen
    #3
    Sometime an SMC reset might help.

    Does holding down the Option/Alt key after the startup sound get you a selection screen to choose (from) which (volume) OS to load/boot?
     

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