I have a macbook 2.4 alu (Late 2008) and Installed linux as soon as I got it.(I just like the cases). Anyway I know that you need to use apple update in osx to update the firmware. I can't dual boot because my HD is MBR. I thought of 2 ways. A. Install OSX onto a usb device (Cost 30-40 bucks for usb) B. Take to apple store, Maybe they can do it. I can't dual boot because my HD is MBR. I heard the new firmware updates stop alot of issues.