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

or you may want to integrate it in your .profile

# x11
_ip=`ifconfig en0 | grep inet | awk '$1=="inet" {print $2}'`
xhost + $_ip > /dev/null 
export DISPLAY=$_ip:0

test an GUI app, e.g. firefox

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

xhost + localhost

MacOS/Windows Docker Desktop only!
- use host.docker.internal to access localhost on host from docker container.

docker run --rm  --name firefox -e DISPLAY=host.docker.internal jess/firefox

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