message: Small change for python setup on MacOS
diff: @@ -20,11 +20,12 @@ We recommend using Ubuntu.
  ## Setup on MacOS
  1. Install pyenv: `brew install pyenv`.
  -2. Run `pyenv install python3.7-dev`.
  -3. Set this as your global Python version: `pyenv global 3.7-dev`.
  -4. Also add this Python version to your `~/.zshrc` by adding `eval "$(pyenv init -)"`.
  -5. Install an older version of the virtualenv package by running: `pip install virtualenv==16.7.8`
  -6. Now you can follow the same steps as when using Linux.
  +2. Install a newer version of tcl-tk: `brew upgrade tcl-tk`.
  +3. Run `pyenv install python3.7-dev`.
  +4. Set this as your global Python version: `pyenv global 3.7-dev`.
  +5. Also add this Python version to your `~/.zshrc` by adding `eval "$(pyenv init -)"`.
  +6. Install an older version of the virtualenv package by running: `pip install virtualenv==16.7.8`
  +7. Now you can follow the same steps as when using Linux.
  ## Frequently Asked Questions (FAQs)
  #### Python.h not found
  