AFAIK, the community map editors do not work on Mac. Your only chance is if the official editor but I don't even know if the game itself runs on Mac.(0)
I'm a fan of Vocaloid (Miku, especially) and GARNiDELiA and I prefer maps that can be skillfully and consistently FC'd so expect my maps to fit into those categories. Also, if you ever wonder about the avatar, it's a throwback to my APB: Reloaded days.