Using Gaussian Remotely via Mac OS X

Xquartz 2.8.0 on BigSur 11.2.1: 
defaults write org.xquartz.X11 enable_iglx -bool true


Note: The error below hasn't been reported to happen on High Sierra. It may or may not be a problem, just haven't had a system to verify. If you have problems, reach out to!

Using the XQuartz 2.7.11 (released on 2016-10-29 with xorg-server 1.18.4) with El Capitan or Mojave, we get the following error:
$ gv
libGL error: No matching fbConfigs or visuals found
libGL error: failed to load driver: swrast
[xcb] Unknown sequence number while processing queue
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
gview.exe: xcb_io.c:259: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed.

For one user that is running El Capitan or Mojave here is the fix

1) use a lower version of XQuartz, namely 2.7.8
2) Copy and paste this into a Terminal window of your Mac NOT the cluster!
defaults write org.macosforge.xquartz.X11 enable_iglx -bool true


sudo defaults write org.macosforge.xquartz.X11 enable_iglx -bool true
3) Relaunch gv (Gaussian)