I have a Mac Mini and Thunderbolt display, and a Dell tower and Dell screen. I would like to connect the screens so I can use them with either system. Right now the Mac works with my Thunderbolt display and the Dell only works with the Dell display. I would like to toggle between the two systems so I can use both screens with either computer by simply flipping a switch. Or, even better, is it possible to have dual Thunderbolt displays and run OSX on one screen and Parallels/VM Ware on the other, running both OS' simultaneously and not have to switch back and forth? In layman's terms, could someone direct me with to the equipment I would need or if the operating of 2 OS' at the same time is even possible. Hopefully this makes sense. If any clarification is needed, please let me know. Many thanks in advance.