Popup Menu with 3D Mouse

When using a 3D mouse with both the mac and windows version of rhino, how do I map a button on my 3D SpaceMouse to pop up the popup menu or the right click menu?

Win Rhino:
Options>Rhino Options>3D connexion buttons

Mac Rhino:
Preferences>3D connexion

What would the command to type into the button action box be for the popup on mac?

showtoolpalette T popup A Y enter

Thanks!