So I bought this, assuming it would run on my MacPro. Apparently, that's not the case. Every time I attempt to download the 1.74 update, the game hard-freezes about 1/2 way through the download. Not only that, the game requires you to insert the DVD before playing! What is this, 1995?!? You'd think a dual-Xeon machine with 6GB RAM would have no problem running the game...And why is there no download for the 1.74 patch? I can download 1.61c, but 1.74 requires you to use the in-game downloader. Very annoying! Not only that, the support system is convoluted. I can't possibly be the only person to have this problem! If Aspyr support doesn't answer my problem soon, I'm sending this one back to Amazon.I'll post again if anything changes.<update> The game crashes often, for some reason, so I eventually stopped playing it. Perhaps by now it's updated to the point where it will play. I just can't get excited about playing it anymore.