Box Command will NOT create closed object

Hey guys,

Think something is seriously wrong with my program. I am using the regular Box command. When I pull and enter, it just has an open object. No top. I have an issue with all my poly line extruded objects as well.

Running Rhino 6 on mac. Hair pulling! Just started-

Why don’t you use <box, corner to corner height>

also check your display settings and surfaces is checked.

The box has a top (and a bottom)… Properties says it’s a closed extrusion.
There is something wrong with your display settings, or your Mac’s graphics are not adequate to run Rhino. Please run SystemInfo in Rhino and post the results here.