Pip install pygraphviz fails: Failed building wheel for pygraphviz

Question

I have troubles installing pygraphviz on macOS 10.10.5. I have a fully functional installation of Python 2.7.x, and I\'d like to run the test example of queueing-tool, which

Answer 1

The comment by Andrew brought me on the right path. Thank you for that.

It turns out that a detailed solution for installing pygraphviz on macOS is already available on stackoverflow, see this solution by teut.