Generating an ERD (Entity Relationship Diagram) can be helpful to understand what your database looks like, and is also really easy to generate if you’re running a Python/Django Application.

Step 1: Install django-extensions and graphviz

 pip install django-extensions && pip install graphviz

Step 2: Add django_extensions to settings.py

INSTALLED_APPS = [
    ...
    'django_extensions',
    ...
]

Step 3 Create the .dot output and convert to .png

Run manage.py graph_models from the environment you may normally use:

python manage.py graph_models -a > output.dot

From your mac, change the format to png using graphviz

brew install graphviz
dot -Tpng output.dot -o output.png

References
Django Extensions graph_models docs
Django Extensions Commands Unavailable?
Opening .dot files on mac