Tested on OS X 10.10.4 Yosemite, 2015-07-06
Install Python 3.4 from downloadable installer from https://www.python.org/downloads/
mkvirtualenv --python=/Library/Frameworks/Python.framework/Versions/3.4/bin/python3 envname
(To re-start the virtualenv, workon envname
)
Install basics: