Yeah, not sure either:
TurboCAD Mac Designer v7
Macintosh® OS 10.6 or higher, Intel® Mac®, 4 GB of hard disk space, 1GB RAM or greater, Mouse Pointing Device (wheel button recommended), DVD-ROM Drive.
TurboCADMAC Pro v7
Macintosh® OS 10.6 or higher, Intel® Mac®, 4 GB of hard disk space, 1GB RAM or greater, Mouse Pointing Device (wheel button recommended), DVD-ROM Drive.
TurboCADMAC Deluxe v7
Macintosh® OS 10.6 or higher, Intel® Mac®, 4 GB of hard disk space, 1GB RAM or greater, Mouse Pointing Device (wheel button recommended), DVD-ROM Drive.
Seeing version 2 for $100 on eBay.