to install the game on MAC, you have to:
1. if you already have the game installed on your computer, uninstall it and clear your browser cache.
2. download the game installer from the website
3. open the dmg file
4. drag and drop the .app file to the Applications shortcut
5. go to the Applications directory
6. execute the launcher's game
It worked perfectly for me. If you are on Windows, just email them.