I did this today on a 2010 MBP with a 250gb optibay drive. Nuked everything, ran the terminal commands from the Mountain Lion on usb stick, then installed moun

I did this today on a 2010 MBP with a 250gb optibay drive. Nuked everything, ran the terminal commands from the Mountain Lion on usb stick, then installed mountain Lion. Installed and works great. Fast.