Hey all, I'd like to announce that XQuartz 2.7.10_rc1 is available. Full changes since 2.7.9 can be seen in the release notes: https://www.xquartz.org/releases/XQuartz-2.7.10_rc1.html The main change since 2.7.10_beta2 is around the libXt compatibility hack for Motif. Because of issues with applications that use both Motif and libXaw, I've abandoned the previous approach of shipping /opt/X11/lib/libXt.6.dylib as flat_namespace and /opt/X11/lib/libXt.7.dylib as the two-level namespace version. Now, /opt/X11/lib/libXt.6.dylib is two-level namespace, and /opt/X11/lib/libXt.7.dylib is provided as a symlink to it for compatibility. This means that Motif based applications will fail to launch by default unless this bug is fixed in Motif. As a workaround, we're shipping the flat namespace dylib hack at /opt/X11/lib/flat_namespace/libXt.6.dylib. Users who require that version have two options: 1) Replace the two-level namespace version with it (sudo cp /opt/X11/lib/flat_namespace/libXt.6.dylib /opt/X11/lib/libXt.6.dylib) 2) Launch your Motif applications using DYLD_LIBRARY_PATH=/opt/X11/lib/flat_namespace This should not be seen as a long-term solution. Hopefully someone will step up to fix Motif to not require this hack. Please give this a try and comment on the effectiveness of this approach if you use Motif-based applications. Thanks, Jeremy