Use Control-Click for button3 in Apple's X11
Popping in for a quick note. Something that has annoyed me for awhile is that Cmd-Click is what my X11 on OS X has been using by default to simulate a right-click. What I just found out is that I can do this:
defaults write com.apple.x11 fake_button2 option defaults write com.apple.x11 fake_button3 control
man Xquartz in a terminal does wonders.