There are different degrees of retro. For example you might want to play Halo, Portal. Even though Microsoft bought it before it was released for Mac, there wa

There are different degrees of retro. For example you might want to play Halo, Portal. Even though Microsoft bought it before it was released for Mac, there was still a decent size community which extended the original Mac demo: https://www.halomd.net/ https://www.halomd.net/