Displaying Graphical Programs on MacOS
XQuartz is an open source version of the X11.app application that used to come preinstalled on macOS.
Mac X11 Forwarding
For forwarding remote X sessions over ssh you can use either Terminal.app (also found in
/Applications/Utilities) or xterm. If you are using the Mac OS X Terminal, you will need to set your DISPLAY variable. Enter this statement into the file
if [ -z $DISPLAY ]; then export DISPLAY=:0.0; fi
and then start a new Terminal window. If you are using xterm, the variable should be set for you.
On the Mac you should also use the -X and -Y options:
ssh -X -Y [email protected]