pycallgraph with pycharm does not work

The answer is:

In menubar:
Pycharm -> Run -> Edit Configurations...

In dialog:
for selected .py file or for Defaults/Python:

Environment field group:

Environment variables > ... -> + ->
Add entry:
Name: PATH
Value: /usr/local/bin

Include print environment variables should be selected

Install graphviz in MacOS by using:

brew install graphviz

or in Ubuntu by using:

sudo apt-get install graphviz

Then you can test dot by using:

dot -v

You can also download pkg from here