It is Small's third Macintosh emulator for the ST, replacing his previous Magic Sac and Spectre 128. Designed by David Small and sold through his company Gadgets by Small, it allows the Atari ST to run most Macintosh software. The hardware consists of a cartridge that plugs into the Atari ST's cartridge port and a cable that connects between the cartridge and one of the floppy ports on the ST. The Spectre GCR is a hardware and software package for the Atari ST computers.
