I'm curious how much Metal matters but it seems like they went from GPU to CPU in Yosemite and then back to the GPU. The review sorta skimmed on Metal but repo

I'm curious how much Metal matters but it seems like they went from GPU to CPU in Yosemite and then back to the GPU. The review sorta skimmed on Metal but reported that it only worked on a Mac Pro 2013, which lead me to wonder why my 2008 Mac Pro couldn't run it with a GeForce 680 GTX, turns out it can. http://netkas.org/?p=1405 http://netkas.org/?p=1405