V-Ray on MacBook - Asset Editor Window Issue

I’m a new V-Ray user, working on a (fairly new) Macbook.

When I open the interactive frame buffer, my asset editor is then only visible on its own screen, with a black background. I can’t get the frame buffer and the asset editor on the same page. The screenshot shows how my asset editor appears after I open the frame buffer.

Have I done something wrong? I won’t be able to see the impact of the changes I am making to materials and lighting in the asset editor if I can’t see the interactive rendering buffer screen at the same time.