Fully tested Iomega Zip 100 SCSI drive for Macintosh or PC including original power adapter and SCSI cable. This is the dark blue original version. The SCSI ID can be set to 5 or 6 via a switch on the back, and a second switch allows SCSI termination power t be turned on and off. The Iomega driver is required and the Macintosh installers can be downloaded from macintosh repository.org.