Just a shot in the dark but have you tried resetting your custom theme back to default Rhino for Mac in the Rhino Preference window? I see you have more than two inspector windows in your sidebar.
@jespizua - thanks, not the solution, but a good trace…
it seems like properties is only working for the top 2 sections. the set-up i am using worked in rhino 5 and in rhino 6 with an older system. so i still believe it s a bug
@Tom_ I was having the same problem after upgrading to Rhino 6. I also did a clean uninstall/reinstall.
I reset custom theme to default Rhino for Mac and got the same results as you (Properties only working in top two sections).