I wanted to install NS-3 on my macOS, so I followed the documentation but in the end Python-visualizer did not get installed. So for that I tried installing it by following steps here.
>>port install py27-pygtk py27-pygoocanvas py27-pygraphviz
This took 10 minutes to execute and ended with a message as: Error: Port py27-pygoocanvas not found
I cannot find any help online regarding how to fix this, please guide. Thank you.