My sister and I are both trying to download this game on our macs, but when we do and use a software to extract it, it either opens the content folder, or makes it an app. When we click on the app to play the game, the pop up comes up saying that the application can't be opened. What do I do? Is there a certain extracting software we need to be using? We tried a bunch of different one, but they didn't seem to work.