Document how to fix macOS/Python 3.6 certificate issue

docs/getting_started.rst

@@ -12,6 +12,28 @@ run::
 
     pip install --upgrade cloudbridge
 
+Common Setup Issues
+-------------------
+
+**macOS Issues**
+
+* If you are getting an error message like so: ``Authentication with cloud provider failed: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:749)``
+  then this indicates that you are probably using a newer version of Python on
+  macOS. Starting with Python 3.6, the Python installer includes its own version
+  of OpenSSL and it no longer uses the system trusted certificate keychains.
+
+  Python 3.6 includes a script that can install a bundle of root certificates
+  from ``certifi``.  To install this bundle execute the following:
+
+  .. code-block:: bash
+
+    cd /Applications/Python\ 3.6/
+    sudo ./Install\ Certificates.command
+
+  For more information see `this StackOverflow
+  answer <https://stackoverflow.com/a/42583411/1419499>`_ and the `Python 3.6
+  Release Notes <https://www.python.org/downloads/release/python-360/>`_.
+
 Create a provider
 -----------------
 To start, you will need to create a reference to a provider object. The