I want to use fonts other than those currently available for the mac version. How do I go about this?
Can’t Mac Rhino use any of the fonts available to the OS (like Windows) ? Rhino (Windows or Mac) does not install any fonts itself, it only uses those already on the system (as far as I know).
You can use Font Book - which comes with macOS (/Applications/Font Book.app) - to add and remove fonts.