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PEN10k

macrumors regular
Original poster
Jul 3, 2012
106
0
Denmark
Hello Guys
I want to peform a clean install of Mountain Lion on my rMBP.
I've created a USB stick installer through disc utility.

But when I restart the computer, and hold down ALT to view the different boot options, my ML USB installer won't appear?

Anyone who can help?

Thanks!
 
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