There unfortunately are many user tools in the business that offer no OS client, I had to bring on the Mac better or worse Windows. Parallels Desktop 6 is a sophisticated software to install Windows on a Mac without the structure and efficiency of the Mac to damage. Of particular note is the simple switch between the operating systems using a desktop switch. (Press two buttons and you are in Windows) Very good is also the query of the connection of devices and storage media. So it's very easy to assign the respective media Betiebssystem. The only, but negligible downside is the slightly slower performance of Windows. I have Windows 7 installed.