 However, SCSI Disk Mode can be implemented unofficially on any Macintosh with an external SCSI port, by suspending the startup process with the interrupt switch, as long as all internal drives on the chain can be set to different IDs than the active host system's devices.When Apple dropped the SCSI interface, starting with the AGP Power Mac G4 and “Pismo” PowerBook G3 FireWire Target Disk mode replaced the earlier disk mode implementation, also receiving official support beyond laptops to all subsequent Macs with built-in Firewire.Thunderbolt supports Target Disk Mode.