cochon Posted July 11, 2012 Share Posted July 11, 2012 this motherboard built-in USB 3. It works fine in Lion 10.7.4. But with 10.8 GM it won't mount external usb 3 hard drive. Did anybody have a same problem Just rollback iousbfamily and iousbmassstorageclass in DP3. Cheers Link to comment https://www.insanelymac.com/forum/topic/280461-ga-x58a-ud3r-usb-3-problem-solved/ Share on other sites More sharing options...
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