Otoy finally released their Octane X fully rewritten for Metal API to utilize GPU on Macs.
I run a quick test on my iMac Pro 8 cores CPU and Vega 64.
Octane X was 3.5 times faster on Vega 64 than cycles on CPU only. Finally Mac owners can be happy (just for 16$ a month).
I have to say I never used Octane before, but switched from cycles to Octane-Blender in one hour, it’s very good product. Consistent results, unlike ProRender.