TurboCAD Mac v6, 5, or 4 drawing files will need to export from their TC2, TC3, or TCP file format to the DWG or DXF file format in order to be read in TurboCAD Mac version 7.
To transfer a 3d object from TurboCAD Mac version 4, 5, or 6 to Version 7 use the .SAT file format.