Apparently you can run MLP: Fighting is Magic – Tribute Edition on Wine if you’re using a Mac. I tried beating up Fluttershy until I started feeling bad. You can’t beat up Fluttershy!
The gist of the “Tribute Edition” is some fans took the leaked alpha of the now defunct FiM project by Mane6 and finished it, slapping on Rainbow Dash and Fluttershy into the roster.