http://www.insanelymac.com/forum/index.php?showtopic=232183&mode=threaded&pid=1577947

샌디브리지 i7을 사용하는 가상머신에서 MAC OS X 업데이트 후

The CPU has been disabled by the guest operating system. You will need to power off or reset the virtual machine at this point.

에러가 나면 vmx에 다음 줄을 추가해준다.

cpuid.1.eax = “0000:0000:0000:0001:0000:0110:1010:0101”