Hehe, this revived my NEC/Renesas based ExpressCard in my old MacBookPro. Well, somehow...When booting my MBP, it correctly shows the USB 3.0 Bus, but says "AppleUSBXHCIPCI" is it's driver. System profiler -> Software -> Extensions clearly shows that GenericUSBXHCI is loaded, though.USB 2.0 and USB 3.0 devices will be shown in System profiler, but never mount. xhcdump doesn't show anything either.I started plugging my USB thumb drivers into the 2.0 ports, back in 3.0, removed the whole card and inserted it again, replugged the thumb drives a few more times, and suddenly both USB 2.0 and 3.0 started to workSystem profiler does NOT list the USB 3.0 port anymore, but it's clearly working.After removing the card or rebooting I have to do the whole procedure again. Not quite sure what made it finally work, maybe just waiting a long time with a device installed?