The Brew viz command reads the Berksfile.lock in the current Chef cookbook directory and saves the cookbook dependency diagram in the graph.png file.
The command requires the graphviz utility
In the terminal window execute
brew install graphviz
Generate the cookbook dependency diagram and open it in Preview
In the Chef cookbook directory execute
berks viz;open graph.png
If you get the error message
The lockfile is out of sync! Run `berks install` to sync the lockfile.
If the error persists, execute