If you are interested I shared my experience on egpu.io: https://egpu.io/forums/mac-setup/my-experience-with-cryptomining-on-macos/

Right now I got Keccak working pretty nice but I haven't tested out all of them. I'm planning on testing out other algorithm later this week and keep sharing my experiences on egpu.io

Super happy it works on High Sierra Beta with native eGPU detection!