Well, this Penlite is based on a Duo 230, which guarantees that the port is *NOT* a FireWire port. Among the many strikes: 68k architecture, NuBus, System 7.1. FireWire was only ever available on PCI PPC's with Mac OS 7.6.1 or higher. (And was only officially supported by Apple on a G3 with Mac OS 8.1 or higher.)