[REQUEST] BIOS UNLOCK FOR VAIO

I'm trying to install mac os x on my sony vaio so I need to change my sata controller to AHCI. Currently i can only access the intel intel virtualization technology and my boot order and thats it (and the main detail page) .

-Make and Model:
14 inch VAIO E Series (White)
Model:VPCEG28FA

-BIOS :
BIOS Update version R0240Z8
http://www.sony-asia.com/support/downloa.../vpceg28fa