Maybe that will change in the next few years if OpenGL gets better and Apple consistently makes computers that have actual GPUs, but for now, you'll just have to wait a year or two for the Mac version to come out.
Wow. Where have you been all year?
This is coming to you from a
MacBook Pro with an i5-520M (dual core, four logical cores because of hyperthreading). It has two (in numbers: 2) GPUs:
The first GPU is the on-die Intel HD graphics that is part of the CPU package, and uses so little power that I can confirm, to my own amazement, that Apple's usually inflated claims of battery time are true till at least till the eight-hour mark (Apple marketing claims up to ten hours).
The second GPU is a NVIDIA GeForce GT 330M with 256 MByte GDDR3 RAM, an "actual GPU", as you put it. Depending on demand, OS X switches from one GPU to the other transparently.
As for the claim here that Macs aren't used in graphics or TV, let me quote the
Wikipedia (my emphasis):
From the early 2000s, Final Cut Pro developed a large and expanding user base including many independent filmmakers. It has made inroads with film and television editors who have traditionally used Avid Technology's Media Composer. According to a 2007 SCRI study, Final Cut made up 49% of the US professional editing market, with Avid at 22%
As for waiting two or more years for OS X versions: The 90s are over. Blizzard of course has always released both versions in tandem, and you might have heard that Valve has ported Steam to the Mac. You can even
check their statistics page to see what hardware the Mac users are coming to the board with. They have
some info out on their initial experiences, like that a game is five times as likely to crash on a PC than on a Mac.
Also, and here we get to the point where you are correct, the games on Macs are slightly slower at the moment. This is not a hardware problem at all, but the result of Apple's drivers being optimized for stability instead of gaming. Apple and Valve are both working on this full throttle, and in a few months at most, this problem will be history in the same way the PowerPC chip and one button mouse are now. Currently, Valve has released Portal, HalfLife 2, and Team Fortress 2 for the Mac -- Wednesday is release day -- all games that are slightly older. P and HL2 run fine and fast and in native resolution on this MacBook Pro.
Where does this leave us with Firaxis? Well, at the moment, they are missing the trend. Industry sales for PC are deceptive, because the include sales to companies, computers which will never see a game in their life. Mac sales are beyond strong, which is one reason why Apple surpassed Microsoft in stock market valve a few weeks ago (don't know where they are now). Software development systems are to the point where creating both versions in parallel should be automatic -- Valve claims that each and every build spits out a Windows and OS X version. This is not rocket science.
On a more personal level, Civ V will be the only game left I am interested in that I would have to reboot for (L4D, L4D2 and Portal 2 are from Valve; StarCraft 2 and Diablo 3 are from Blizzard; Diablo 2 and Master of Orion 2 run on Windows in VirtualBox). Keeping a Windows partition around only for one single game is a lot to ask, especially if it turns out that my worries about Civ V are confirmed.
