esoxx Posted September 6, 2016 Share Posted September 6, 2016 Hello, I'm having problems to have USB 3 working properly on my El Capitan clean install. I've installed the GenericUSBXHCI.kext. All USB port are working as USB2. The Mobo is a GB X79s-UP5 WIFI. All USB 3 drives are mounting but at USB2 speed. I can't find a solution to fix this. Link to comment Share on other sites More sharing options...
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