3D Card in MacPro DESKTOP (not laptop computer) video card outdated – Mac Technical Help

Tried launching Traditional at this time and acquired the next error:

“Your 3D accelerator card shouldn’t be supported by World of Warcraft. Please set up a 3D accelerator card with dual-TMU help.”

I had been led to consider that this “Apple Metallic API” problem solely utilized to MacBOOKS (laptops) which had a built-in GPU which couldn’t be modified, however that for those who had a Mac Desktop – with a devoted and new Video Card – this shouldnt be an issue. I’ve a Sapphire Radeon 8GB…thought this may be greater than sufficient, however I get the error.

Is it in reality true that it doesn’t matter what video card we put on this 2009 MacPro Desktop, it wont run Traditional? Please advise!