Blender 2.8 isn't recognizing my graphics card for gpu or opencl rendering. I'm using a mac with a Radeon Pro 580 8 GB graphics card. Are there any articles about best graphics card for use in Blender? I'm thinking about buying a new one, since the cpu rendering takes very very long. Any tips would be greatly appreciated!
Blender is only capable of doing GPU rendering on CUDA (NVIDIA cards) and openCL (originally develop by Apple & maintained by Khronos group)(1). However Mac dropped support for openCL(2) therefore there is no way to use an AMD GPU for GPU rendering on Blender nor other software that uses only openCL.
The only option, that I haven't tested is to try to use Linux on your machine and download AMDGPU-PRO from AMD's website. No guaranteed to work.