Docker for Mac and GUI applications

1. install xquartz

brew install xquartz

reboot Mac

run XQuartz
```
open -a XQuartz
```
- a xterm window should popup
In the XQuartz preferences, go to the “Security” tab and make sure you’ve got “Allow connections from network clients”

run xhost and allow connections from your local machine

ip=$(ifconfig en0 | grep inet | awk '$1=="inet" {print $2}')
xhost + $ip

find your displaynumber

display_number=`ps -ef | grep "Xquartz :\d" | grep -v xinit | awk '{ print $9; }'`
echo $display_number

test an GUI app, e.g. firefox

docker run --rm  --name firefox -e DISPLAY=$ip:0 -v /tmp/.X11-unix:/tmp/.X11-unix jess/firefox

import matplotlib
matplotlib.use('tkagg')
import matplotlib.pyplot as plt
plt.plot([1, 2, 3])
plt.show()