OSX Leopard: Keep XTerm from starting with X11

As we established before, X11 on OSX 10.5 Leopard is, at least kind-of, broken.

Gladly, there are numerous community efforts to bring our tragic hero back on stage. For example, like in OSX 10.4 Tiger, it is possible to deactivate the XTerm window starting up every time you start X11. It has just become a little more complicated.

First, this is what has changed with launching X11 on Leopard (as described on boredzo.org):

In Tiger, when you launch X11, it runs .xinitrc, and .xinitrc runs xterm (unless you comment that line out).

In Leopard, X11.app is just a launcher. All it does is run /usr/bin/login -pf $USER /usr/X11/bin/xterm. In other words, its only purpose is to run xterm (semi-)directly, by itself--it's not the actual X11 server anymore. When xterm starts, launchd sees it, notices that xterm requires X11, and launches the real X11 server (/usr/X11/X11.app) automatically.

In other words, there's no commenting out a line in .xinitrc anymore in Leopard. Instead, we need to change the launcher itself (as described in the very useful X11 on Leopard FAQ on macosxhints):

defaults write org.x.X11_launcher app_to_run /usr/X11/bin/xlsclients

Instead of xlsclients, we can alternatively run xprop (thanks, JP!). Both applications have the good habit not to do much (i.e. not to waste a lot of cycles/energy/water/CO₂/whatever) and also not to open an annoying window like xterm does.

Hope this helps :)