My setup is : i5-3570k, gigabyte z77-ds3h, 8gb corsair ram,
I completed succesfully everythin of the installation of step 1, step 2 and step 3.
At step 4, i restart the pc, i choose the "mountain lion" option (option 1 = usb, option 2 = M. lion)
Its starts loading (white screen with apple...