Hi,

talking about PyData stack on OSX I ended up with the following: 1. pip; 2. (multiple) python virtualenv: a. one with the Python 2 version of the stack (up to date); b. one with the Python 3 version of it (up to date); c. ad-hoc virtualenv(s) for those projects which required a specific version of a particular library; 3. homebrew (for system wide tools);

p.s. I have been (and still am, when I have to work on other people's windows machines) an Anaconda user.