Iirc the main problem is in order to install the game or something, you need an old version of OSX, because the game only was able to be installed on like the original OSX. I just took the files from an old mac at my house and put them on my newer laptop (this was a couple years ago), already installed, and it worked no problem. You might need to patch the game outside of the client too, which is nbd.]
So I would suggest downloading it already installed, which should be legal enough if you actually own the game.