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

Basically you need to download graphviz first using brew:

brew install graphviz

pip install graphviz

pip install pygraphviz 

You can also try using pip3 in place of pip just in case there is Python's version issue. Hope it helps.