FWIW, MFC will be useless for a user on macOS.
The DevKit only supports using the Graphisoft provided dialog resource methods. For anything beyond that, I guess you are on your own. I think you either use the method provided or may fall back on using a Browser component and a Web UI.
--- stefan boeykens --- bim-expert-architect-engineer-musician ---
ARCHICAD-user since 1998