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  1. #1

    Member Since
    Mar 07, 2012
    Unhappy Unable to boot from USB
    Hello everyone.

    I have a Macbook Air, and it has boot camp installed.
    I need to boot from a USB to reinstall the OS, but I am unable to.

    Reading about it, it seems that this is due to boot camp being installed setting the default boot device to the Boot camp partition.

    I need to reinstall the OS, to fix a lost password. The Mac is from a former employee and we are unable to get his password.

    Can someone please help me out?
    I was reading, i am also wondering if resetting the PRAM would solve this problem? I do believe that this will set the default drive back to the mac OS drive, which will also allow me to boot into single use rmode.

    Can someone please advise me on this? I do not want to take any aciton yet since i am unsure on what i am doing. This is my first time working on a MAC.

  2. #2

    louishen's Avatar
    Member Since
    Oct 22, 2007
    Mac Mini Core i7 2012 | White 2009 MacBook 2 Ghz | 733 Mhz G4 Quicksilver
    Alos you need to make sure that the USB drive is formatted to Mac OS Extended (Journaled) and that it has a GUID partition table (its in options when you partition a drive)
    Member of the Month September 2008 & August 2012 | Found advice useful? use the rep system

  3. #3

    Member Since
    Mar 07, 2012
    i would still like to know if i can reset the PRAM. What are the possible problems if i do that.

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