You are running a brew of linux, its called OSX.
What gets me is how people think that just because they are getting an Apple "branded" product that its going to be better quality, and as you say work out of the box, but thats the marketing for you.
So much for it all working nicely together as a package,
now you've got to go and install Windows on a Mac to get programmes working, Microsoft must be having a chuckle to themselves, getting into a market that they NEVER would have done.
Very poor on apples part this, especially on a Mac Pro.
Hoping that theres a solution that will just let you use it with the OS you bought with the PC
"No pressure, no diamonds" Thomas Carlyle