I was holding my breath *hoping* that my ORIGINAL Motu Ultralite mk1 would work with my new Macbook Pro i5 17"'s firewire 800 port with the 400 to 800 adapter and sure enough, it does. Everything on the Motu website is for the mk3 version so I didn't know what the deal was, that and Motu's customer service line stays busy! I was afraid I'd have to buy the Apogee Duet! Saved me $500! In before the "cool story bro".