I'm running the 2.80 release candidate on my 5k iMac with an AMD card on 10.14. It doesn't support rendering on the GPU but the CPU rendering works just fine. I

I'm running the 2.80 release candidate on my 5k iMac with an AMD card on 10.14. It doesn't support rendering on the GPU but the CPU rendering works just fine. I can't imagine the GPU is any faster than the CPU either, certainly the case for my 750M in my 2014 15" rMBP.