Disable message 'Do you REALLY want to quit X11?'

Question

I am on OS X 10.11.2, running this version of X11. When I quit X11, I get the dialog window 'Do you really want to quit x11?', of which I would like to get rid.

None of the answers that I found online worked (like this one) for me. In fact, I tried both

defaults write com.apple.x11 no_quit_alert true

and

defaults write org.x.x11 no_quit_alert true

from command line, but I still get that annoying window. Do you know why those solutions do not work?

Thanks

Answer 1

This worked for me..

defaults write org.macosforge.xquartz.X11 no_quit_alert true