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I can't boot from any external drive using my new MacBook Pro Retina, even a drive with OS created by the Recovery HD of the Retina. Anyone have a solution?

7331 Views 20 Replies Latest reply: Jan 18, 2014 11:40 AM by _LB RSS
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DFTeitel Level 1 Level 1 (5 points)
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Jul 12, 2012 8:54 PM

I have a variety of external drives with universal Lion systems on them, and none of them connected via USB boots my MacBook Pro Retina. I don't have ability yet to connect by thunderbolt. Does anyone else have this problem, or knows of support. Applecare has yet to figure it out.

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