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When I start the X11.app then it launches an xterm automatically. I've long since switched from the "ordinary" xterm to rxvt-unicode so the initial xterm just hangs around like a wallflower never being used. Whilst it's not particularly bad, it spoils the look of the place so I'd like to stop it launching. How do I do it?

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defaults write org.macosforge.xquartz.X11 app_to_run /usr/bin/true

in a Terminal. However, note that there really shouldn't be necessary to every start XQuartz.app (or X11.app; see the comments) manually. It will start automatically when you run an X11 client, and then it will not start its defaults startup application.

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Uh, sorry, I hadn't noticed that you use X11.app. Don't do that. Use XQuartz for all your X11 needs on the mac. That said, I think X11.app has the same defaults setting, but I don't remember the name of the preferences file. Look for it in Library/Preferences/. –  Harald Hanche-Olsen Jun 14 '12 at 18:44
Last time I used Mac OS X then XQuartz wasn't around so I hadn't heard of that - any other things like that I should know about? For X11 it's org.x.X11, and I set the value to '' which seemed to work as well as /usr/bin/true. –  Loop Space Jun 14 '12 at 18:48
Hmm. No, I can't think of anything other than X11/XQuartz with that particular peculiarity. Though I remain forever confused about whether I should get my Java updates from Apple or Oracle these days. –  Harald Hanche-Olsen Jun 14 '12 at 18:52

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