FYI...I downloaded the mac build and it did not work. (as stated earlier you cannot test the build)
There are only three files in the mac version. Application, license.txt, and readme.txt
That's very strange, as when I download it myself, I have to two text files and a folder called CATACLYSM.app which contains everything needed (including the actual .app file). I suspect that this is a problem with the name that Unity gave to the folder when I made the build. I've renamed the folder to simply "CATACLYSM" and re-uploaded.
Thank you for letting me know though! I'm going to look into renting a MAC book from the library or something so I can try it out myself.