As i am used to several MacPorts based apps, X11. is one of my daily login items.

I was always wondering if there is a “hack” to get X11 closed while shutdown without having that “are-you-sure” dialog.

Yes there is:

1. Open X11.app
2. Open Terminal.app
3. In Terminal enter:
   1. To disable the dialog:
      1. defaults write com.apple.x11 no_quit_alert true
   2. To enable (default):
      1. defaults write com.apple.x11 no_quit_alert false
4. Close Terminal.app
5. Close X11.app

The change will take effect the next time you open X11.

Additional informations about that topic can be found there.

Tags: 10.4, com.apple.x11, darwinports, login-items, macports, X11