Merge pull request #835 from cclauss/patch-3

Changes in how homebrew installs Python on Mac OSX

docs/starting/install/osx.rst

@@ -77,6 +77,15 @@ or Python 3:
 
 This will take a minute or two.
 
+Homebrew names the executable ``python2`` so that you can still run the system Python via the executable ``python``.
+
+
+.. code-block:: console
+
+    $ python -V   # system Python interpreter
+    $ python2 -V  # Homebrew installed Python 2 interpreter
+    $ python3 -V  # Homebrew installed Python 3 interpreter (if installed)
+
 
 Setuptools & Pip
 ----------------
@@ -93,6 +102,12 @@ that is recommended over ``easy_install``. It is superior to ``easy_install``
 in `several ways <https://python-packaging-user-guide.readthedocs.io/pip_easy_install/#pip-vs-easy-install>`_,
 and is actively maintained.
 
+.. code-block:: console
+
+    $ pip2 -V  # pip pointing to the Homebrew installed Python 2 interpreter
+    $ pip3 -V  # pip pointing to the Homebrew installed Python 3 interpreter (if installed)
+
+
 
 Virtual Environments
 --------------------