Outdated question no longer applies.
It depends mainly on what Spyder sees as your current / default python.
You installed python via
pip right? So you can find out which
pip is serving with:
It will show something like:
pip 9.0.1 from /private/home/soumith/anaconda3/lib/python3.6/site-packages (python 3.6)
And that roughly gives you an idea of which python your
pip is using.