The Optiarc DVD RW drive he's referring to is an external optical drive.
If your Mac does not recognize the Apple external optical drive, try another brand.
Wrong!!!!
the external mac book air cd rom drive works on all macs just on older macs you have to have a powered usb hub because there is not enough voltage to handle the drive
To the best of my knowledge...the slim aluminum external Apple optical drive does not work on all Mac's.