I can not locate the “Default Tray”. I checked the “window” pull down menu and there is no option to show it. I just bought the pro version today after using the web app for a year. I uninstalled SU and reloaded it - no joy… Not off to a good start.
I am using a Mac M4 mini and running OS Tahoe 26 (That just came out yesterday).
Again, there never was a tray in SketchUp on Mac. As I wrote, you can open the inspector panels via the Window menu and drag them so they dock together on the screen. Place that over to one side and it’ll approximate the tray in SketchUp on Windows.
Here’s a visual for reference as to what Dave described. Note that Materials and Fonts can’t be docked as they’re driven by the Mac OS - which overrides how they function in SketchUp.