Building it can be done by going to the jobs directory and execute:
./makeModuleCellGui.sh
This will create a MacOS app in directory dist that can either be started by:
The following commands are relative to the clone root directory.
open -a dist/pcells-1.7.0.app
or, in case you want to debug things, you can run:
java -Xdebug -Xrunjdwp:transport=dt_socket,address=8000,server=y,suspend=n -jar \
dist/pcells-1.7.0.app/Contents/Resources/Java/org.pcells.jar
Of course the app version needs to be adapted accordingly in case you are starting another version. Then use your IDE to remote debug on port 8000.