I'm wanting to use the gnu backgammon app, but I have to install x11 first. Firstly, is it the X11 SDX file in the xcode tools package, or something else? I've read about a file called X11 User, but I can't find it on my disc. Do I just install the X11 sdx app, or do other apps need to be installed as well? How do I delete this if I decide I don't want to use the gnu backgammon or have x11 on my mac? Is anyone using gnu backgammon? I'm using the latest Tiger btw. iMac intel Core duo.