Yes, that will work. From Mac Pro, you will see rPlay on pi as a receiver device, and you can mirror Mac Pro screen to the TV that is connected to pi. From Mac Pro, you can configure TV as a mirror or as extended display . The TV to the Mac is no more different than a 2nd external monitor .
hay i am just wonted to see if your still looking for testers if you are my email is firstname.lastname@example.org
and my pc is runing AirParrot 2
i am hopeing i can get my oculus rift dk2 to work with the sofwer