Hi,
After I looked on MacPro5,1 ioreg turned out that it needs 0x0501
for 6 core:
case CPU_MODEL_WESTMERE: // Intel Core i7 LGA1366 (32nm) 6 Core
(Gulftown, Westmere-EP, Westmere-WS)
case CPU_MODEL_WESTMERE_EX: // Intel Core i7 LGA1366 (45nm)6 Core
???
return 0x0501; // Seems it need this!
Reported by THe KiNG, Dec 4, 2010