So, I finally resolved my build issues. Here's 2.4.1_alpha1 for SnowLeopard. It makes that ptty resize option on by default to workaround the bug in xterm/ptty. It installs in /opt/X11, /Library/Launch*, /Applications/Utilities/ XQuartz.app This release is the first to allow differnt X11 servers to "own" $DISPLAY. You can pick which X11 server will actually "own" it by disabling the others' startx LaunchAgents. You will notice (after logout/login) that $DISPLAY now has "org.macosforge.xquartz" in its filename which identifies XQuartz.app as the owner. That being said, SL's X11 assumes that it owns $DISPLAY. If you run X11.app while it's not the owner, it will actually trigger XQuartz.app to start and wait forever for its own startup notification. Hopefully I can get X11 a SoftwareUpdate in a future dot release of OSX to update this (or you can do it on your own by copying over a new X11.bin into X11.app). X11 servers that don't "own" DISPLAY will unset DISPLAY and their children will continue to use the traditional DISPLAY values (":1", ": 2", etc). I did not update the release notes in the .pkg, so you'll need to check the site for a full changelog: http://xquartz.macosforge.org/trac/wiki/ChangeLog Here's the dmg: http://static.macosforge.org/xquartz/downloads/SL/X11-2.4.1_alpha1.dmg Note: X11 alpha/beta updates will only be released for SL. rcs will be rolled for both Leo and SL. It's just not worth the extra overhead. Thanks, Jeremy