llamafilm Posted August 21, 2016 Share Posted August 21, 2016 I use my Hackintosh for high-speed file transfers. The USB 3 ports are not moving as fast as they should, and I don't know where to start troubleshooting this. For example, my USB 3 OWC RAID connected to a MacBook Pro gets about 390MBps write speed. On my Hackintosh, it gets around 290MBps. My motherboard has three USB 3 busses, plus a USB 3.1 (type A), and I've tried them all. No other devices connected except the keyboard/mouse. I never installed any USB-related kexts, it just worked OOTB. By the way the USB 3.1 port functions just like a 3.0, the OS makes no distinction that I can tell. Link to comment Share on other sites More sharing options...
bigben1 Posted October 8, 2016 Share Posted October 8, 2016 check your bios settings, as follows xhci= smart auto xhci preboot= enabled ehci hands off=enabled xcci hands off =enabled. also are you using generic usb kext?? Link to comment Share on other sites More sharing options...
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