Currently Being ModeratedMay 2, 2012 11:07 PM (in response to amraotkar.saket)
in case u previously own a copy of windows, then it will cost nothing.
otherwise, check any store/website for the price of ur desired version of windows. there is no special 'windows for MAC'. everthing else u need to run windows (i.e, bootcamp) on ur mac machine, is included in OS X.
Currently Being ModeratedMay 3, 2012 12:17 AM (in response to amraotkar.saket)
You can install so it runs in an either/or fashion using the built-in BootCamp infrastructure. If your version of MacOS X is Lion, BootCamp pretty much forces you to use Win7, XP is no longer supported or installable.
You can install so it runs virtualized concurrently with MacOS X. The three top virtualizing options are VMWare Fusion ($50), Parallels Desktop ($80) or Oracle VirtualBox (free). While these will not give you the performance of running Windows natively like BootCamp, you can virtualize a wide range of guest operating systems (DOS, Win 3.21/95/ME/2000/XP/Vista/2008/7, Linux, Solaris, BSD, OS/2, etc.).
In all these cases, you will need a Windows license for whatever flavor you choose to use, just like buying a retail box of the product at the store.