Hi Fred, My concern was to see if I could move the Arcus over to an iMac or even another newer tower. You must be aware that the new Mac Pros cannot handle the old SCSI cards. As I see it by moving to adapt the connector to FireWire it would give me more flexibility and I could move over to the newer Macs and keep using my faithful scanner. I will check to see if the ATTO Express PCIPro UL3D can be used on a new Mac Pro. I know that my Adaptec 2906 cannot be used. Thanks, Bill