Your Mac Pro "have" or "haven't" Windows ? mine is yes ! but in parallels for test my script (i am web designer / developer / computer engineering) . must run internet explorer (and sometime windows version of browser) for checking compatibility . small .net project . and no games !!!! (I prefers to play console games much more than PCs games) for me virtualization with mac pro is great combination for my work . not make me annoying windows in virtualization is fast enogh for my work . great !!