MAC Address

How to get  real MAC address in real machine .
we find "PCI\\"  string  of  "PNPDeviceID" in Win32_NetworkAdapter

 we find " ProductName" in Win32_NetworkAdapter
/Chipsets for network cards
"Atheros"    "Broadcom"   "Intel" "LSI Corporation"  "Marvell Technology Group" "Proxim" "Qualcomm" "Ralink" "Realtek" VIA Technologies" "Winbond"
we can use an UUID  to change MAC address  ,however The  UUID   support only  win 7 , win 8