I have signcut pro on mac osx high sierra 10.13.6, using adobe illustrator with the signcut plug in. I have a graphtec fc3100-120 (old but gold) and have a db25 serial db9 female 9 pin to male 25 pin null modem cable lead attached to a keyspan usa-19hs adapter, cable and adaptor are brand new, loaded drivers as instructions for mac but cannot locate graphtec driver in the list on cutter dialog setup window. Graphtec isn't in the pull down list so a bit stumped at first base so to speak, if anyone can help please.