Hey there and thanks for replying. Unfortunately, Nick from Komodo posted this earlier: "Hi, unfortunately we don't have a contest version for Mac." As Nick works for Komodo, I have to assume that is the official stance unless otherwise specified. Which means that you'll need to download and use the PC version. Obviously, Mac users cannot use the PC version. I've sent a message behind the scenes to try and determine why there is no Mac version of the contest version, and will update when I have an answer.