Your first stop should obviously be: http:https://conda.pydata.org/miniconda.html.
cd ~/Downloads
wget https://repo.continuum.io/miniconda/Miniconda3-latest-MacOSX-x86_64.sh
bash Miniconda3-latest-MacOSX-x86_64.sh
# Lots of license agreements to read and agree to
#Update your .bashrc
source ~/.bashrc
conda update conda -y
# choose a python version and descriptive name
conda create --name descriptive_name3 python=3 jupyter matplotlib pandas
source activate descriptive_name3
# Do things with this environment
# End it with
source deactivate