I am an old hand at Civ, but brand new to iMac. I just opened the box a few hours ago for my first-ever APple computer and set up my iMac Intel Core 2 Duo (MA590LL/A). After that was done, I shoved my brand new Civ IV (MacDVD version) into the slot and...I quickly get the message that I have insufficient free space!@??. What the heck? My specs show I have like, 400 GB free, more free space than the 3.5 Gb required. I am also well over all the other minimums--I mean this is the newest Apple model on the market and I can't even install one measley game? Before you laugh, keep in mind that I am not a techie and haven't the foggiest idea how to install a game onto an iMac. The manual sucks, as does the Apple website. I can only find info on how to install the bundled software, which I already did. What stupid and obvious thing have I neglected here? How loudly will I say "Duhhhh" when someone tells me what would seem clear to moderately bright toddler? Help! I just want my CIV!!!