Will my rx 550 run Mac OS on my Mac Pro 2010

So iv posted this to apple discussions before, and I finally racked up the nerve to buy a gt 120 to fix the issue with my Mac. It used to have a ati Radeon hd 5670 wich didn’t support Mac OS. But I also recently bought a rx 550 4 gig powercolor graphics card. I was wondering if I can put that into my Mac Pro 2010 along with my gt 120 and still have Mac OS running an dve able to video edit or game using the rx 550. I also wanna know if it’ll still work with boot camp because I mainly use Mac for video editing and Windows for everything else. Any answers would help me out, Thx! -Evan