Rhino 5 for Mac Material Revision

Hello I am trying to render in Rhino 5 for Mac and while watching a tutorial on youtube I realize there was a feature that is missing for Rhino 5 for Mac. Like the plus sign when you click the circle under Material.

How do I connect to any browser in my computer to bring in new material or new image for texture when I click the circle under material under layer window?

Hello - is this what you are looking for? Click ‘Choose’…

-Pascal

Thanks Pascal! but also where can I find pre-made materials?

06%20PM

Also where is the best place to download pre-made materials for Rhino render?

not using V-ray or maxwell

I am not sure where I can find material just for in-house Rhino render