What operating systems will be supported? (Score 1)

I have been playing the Civ games since the first version came out. Currently though, I exclusively use the Linux and Mac platforms.. What operating systems will Civ support? If it will support multiple OS's, will the clients be included on the same CD/DVD? (I.E. to use it on a Mac, will we have to purchase a Mac specific version or will the mac client be able to use the same data thats on the Windows version?).