Hi. Indeed, it should be easy. Gloss3D does not use any fancy libraries, only regular Unix ones and GTK3, I just haven't had enough time to try to compile it on MacOS. It'll come.
Hi. I'm actually the creator of Gloss3D. It is true it started as a way to learn how to build a 3D modelling tool, but the ultimate goal was also to provide a full software package (modelling/animation/rendering) with its own community of users.In short, an easy alternative to Blender. I'm working alone on this project, so that's a loooong process. Feel free to join the team however :).