Cycles Rhino 6 Mac

How do I add cycles as a render engine for Rhino?
I thought it was integrated for V6?

The Raytraced viewport mode is the Cycles engine. You can use -ViewCaptureToFile and -ViewCaptureToClipboard to get out renders.

In the WIP version of Rhino 7 it is also the render engine for Rhino Render.