PCIRootUID=0 -npci=x2000 -v
me too,
mobo z87x/ud3h
gfx 760gtx
mountain lion 10.8.5 usb install stick
The first time I succeeded with -v -f GraphicsEnabler=No
Then I ruined my bootdrive, and had to do it all over again.
Now I get stuck at "pci configuration begin"
please help......