I downloaded Arma 3 last night onto my macbook pro. I was expecting a crappy port like most games ported to mac. To my supprise I got about a 10-15% improvement in performance over my bootcamp partition (windows running native on my mac). I have a windows desktop which I will admit vastly outperforms my mac with either partition, but I am very happy that the port is as high quality as it is because I can get that much better performance when I travel, and just when I want to play on my laptop. I'm also very happy to be able to run my favorite game on my favorite operating system!