5 Series:
FixUSB_1000 Clover DSDT fix needed for 1.1 support. No other USB fixes necessary.
http://www.tonymacx86.com/dsdt/176195-clover-dsdt-fixes.html#FixUSB
6 Series:
No USB 3.0 over NEC/Renesas ports. Disable in BIOS. No other USB fixes necessary.
7/8/9 Series:
FakePCIID.kext and FakePCIID_XHCIMux.kext enables full support. Install to /Library/Extensions....
CustoMac Desktop USB Fixes - OS X 10.11 El Capitan - Reference