No , you cannot run OS X on a windows machine.
Buy a mac
Mac OS X is an excellent replacement for Windows 7. You can use Apple's Mac OS X on computers made by Apple. The legal terms you agree to when installing Mac OS X prevent it being installed on non-Apple computers.
Windows XP is an example of an OS. Windows Vista is an example of an OS. Windows 7 is an example of an OS. Mac OS X is an example of an OS.
The operating systems that are compatible with Adobe software include Windows 7, Windows 8, Mac OS X, Mac OS X Snow Leopard and Mac OS X Mountain Lion.
Mac OS X 10.6 still beats Windows. Mac OS X 10.6 systems are more stable and secure than any Windows, and this has been proven. 10.6 still beats Windows in performance. It is also in my opinion more useable than Windows 7.
Mac OS X Lion is better than Windows 7 because it is faster, doesn't get viruses, is a lot more secure and in my opinion has a better user interface. It's up to you though to decide which is better. Remember if you get a Mac you can run both Windows 7 and Mac OS.
Windows 7 and Mac OS X leopard
The most popular operating systems that can be uses on a MacBook include: Mac OS X 10.4 (Tiger), Mac OS X 10.5 (Leopard), Mac OS X 10.6 (Snow Leopard - due soon), Windows XP, Windows Vista, Windows 7, and several varieties of Linux.
Windows or Mac OS X depending on personal preferences and how you define popular.
Windows Vista and Mac OS X are examples of computer operating systems.
Snow Leopard and Windows 7 are two completely different types of operating system. You cannot use software written for Mac OS X (Snow Leopard) on a computer using Windows 7 (or vice versa). On a Mac you can run both operating systems so you can run Windows 7 instead of Mac OS X or in a separate window on top of Mac OS X (Snow Leopard) using Parallels or Fusion (See links below).
Yes, you need to install Windows 7 onto Bootcamp (which comes free with the mac) or parallels, which you can buy. Then you can boot into Windows 7 or Mac OS X.
OS stands for operating system. It is basically what runs your computer. Examples of operating systems are Windows XP, Windows Vista, Windows 7, Mac OS X Tiger, Mac OS X Leopard, and Mac OS X Snow Leopard (there are many more).