Yes same problem with my asus p8z68-v pro/gen3. Haven't found solution yet.
Okay I fixed the USB3.0 problem,
I remove the kext manually and reboot,
USB3.0 is working again. *OMG*
for those who is struggling with 3.0 problem,
Open Terminal and paste this code one line at a time and reboot.
Code:$ sudo -s $ cd /Volumes/<DISK_NAME>/System/Library/Extensions/ $ rm GenericUSBXHCI.kext
reboot your hackintosh and Enjoy.
** I was missing that @jk2309 was came out with this solution first.