I am working on tutorials for Rhino rendering but I cannot seem to access the materials library. All mac Rhino videos are showing it under Render > Materials but this does not show on my Rhino 6 Mac version. I am only able to make some edits in properties panel, and interface is very limited. Does anyone know if there is another way to access Rhino default material library. I attached two screenshots-- one is mine without material option, one is from tutorial video.