I got Atari800X up and running on the Mac Mini tonight. There's something really perverse about running old graphics demos from 1985 on a 2005 computer and a television screen that wasn't even possible "back in the day". Now I just need to see how well it tackles Star Raiders and Zenji.
(Yes, the "Atari" is backwards. The logo text is spinning and I took the picture when it was turned around.)