Now that Macs internally are 100% x86 Intel boxes, you can use BootCamp to run Windows (I believe BootCamp supports both XP and Vista) and then you can run The Witcher natively under Windows--which is an order of magnitude better than using something like WINE under OS X because WINE is a software emulator, and especially when it comes to games, will slow them down dramatically, often to the point of unplayability, if the game you are trying to run under WINE will even run under it at all. The Mac OS market (now OS X) is, worldwide, about 2% of the worldwide Windows market, which means that original games for OS X are few and far between, and only a very few Windows games are ported to OS X at all for the same reason--the entire Mac OS market is too small to support OS X game developers. As well, Microsoft has spent huge sums of money over the years building and supporting Windows gaming APIs (Direct X) without which game development would be far more difficult and costly than it currently is, and even so it isn't inexpensive to go about developing a game these days. By comparison, Apple has spent little to nothing in its history to support Mac OS game developers as gaming has never been a priority at Apple, long before the Mac became an x86 Intel box. The great thing about BootCamp from Apple's position as a hardware OEM is that it eliminates the chief objection many people had about buying a Mac traditionally-- software and hardware compatibility. No one now need fear being left out of any software development cycle because as Macs today are the very same Intel boxes that Windows users buy, today's Mac owner can purchase and run ROOB the very same software that is available for Windows--in addition to buying and using software compatible with OS X. The only added expense for a Mac owner is the cost of the Windows OS he chooses to buy and install, because BootCamp is now standard inside OS X and included, but when you compare that cost to what a Mac owner used to have to spend to achieve very limited software compatibility with Windows (all of the various and expensive x86 hardware emulator cards Apple sold for its PPC boxes come to mind) it's easy to see the tremendous advantages of the neo x86 Mac of today in regard to its greatly enhanced software compatibility.But as others have already pointed out here, rarely is the situation quite so simple as we might like it. You've also got to know whether the hardware that comes in your neo x86 Mac is sufficiently powerful to allow you to run 3d games. In some of the Mac desktops this shouldn't be a problem, but in some Mac laptops, just as is true for some x86 Windows-OEM laptops, it could well be that the hardware you've bought isn't suitable for supporting a 3d-gaming environment--in which case BootCamp and a copy of Windows amounts to only half of what you'll need.