Linux
$ sudo /usr/bin/systemctl restart worker
Or,
$ sudo /sbin/service worker restart
...
macOS
$ sudo launchctl stop com.pipelinefx.worker
$ sudo launchctl start com.pipelinefx.worker
...
$ sudo /usr/bin/systemctl restart worker
Or,
$ sudo /sbin/service worker restart
...
$ sudo launchctl stop com.pipelinefx.worker
$ sudo launchctl start com.pipelinefx.worker
...