Hi @steven.rieleyRG6PS ,

>>>>I can't find the render tea pot icon and every time I go to View, Render. The render window does not appear.

As @vinodkl mentioned, Rendering is not available in AutoCAD for Mac.

>>>>> I can drag and drop materials or assign materials.

On Mac you cannot drag materials from Material Browser, instead - you select object, then select material in the Material browser, right-click and select "Assign to selection"

>>>>All the materials are locked. How can I unlock them?

You cannot edit or create materials in AutoCAD for Mac, this feature also is not available.