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OS X - Operating System General OS operation information and support

Unable to boot from USB


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ScottPaananen

 
Member Since: Mar 07, 2012
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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.
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louishen

 
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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)

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ScottPaananen

 
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thanks.
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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