Not true at all. I replaced my Apple-branded CD-ROM for a LG CD-RW/DVD Combod rive and it's bootable without a hitch, hacked drivers or anything else (modifications). Bootable out of the box. It depends on the manufacturer on whether or not their CD-ROM is Mac-bootable, not your logic board.It seems that unless you replace the drive with same manufacture (make of drive) your removing that you can't boot from CD. Pretty sure its an chipset motherboard thing.