• at 50 Mbps on a modern computer, the 50 MB download including install takes about 30 seconds ;-)

• https://github.com/conda/conda/blob/master/CHANGELOG.md#440-2017-12-20
• Usage: copy one of the two following lines and paste it into your terminal

v=2; f=Miniconda${v}-latest-MacOSX-x86_64.sh; cd $TMPDIR; { curl -LfOsS https://repo.anaconda.com/miniconda/$f ; cd -; } && bash $TMPDIR/$f -b && echo ". ~/miniconda${v}/etc/profile.d/conda.sh" >> ~/.bash_profile; . ~/miniconda${v}/bin/activate

v=3; f=Miniconda${v}-latest-MacOSX-x86_64.sh; cd $TMPDIR; { curl -LfOsS https://repo.anaconda.com/miniconda/$f ; cd -; } && bash $TMPDIR/$f -b && echo ". ~/miniconda${v}/etc/profile.d/conda.sh" >> ~/.bash_profile; . ~/miniconda${v}/bin/activate

• https://docs.anaconda.com/anaconda/install/uninstall/

conda deactivate; rm -rf /Users/christian/miniconda{2,3}; sed -i.bak '/. ~\/miniconda*/d' ~/.bash_profile

# Python version 2 or 3
v=3;

# Download latest miniconda 64 bit
f=Miniconda${v}-latest-MacOSX-x86_64.sh;

# Use a temporary dir such as: /var/folders/9l/wwt.../T/
cd $TMPDIR;

# Use Curl as macOS does not come with wget
# Options: curl --location --fail --remote-name --silent --show-error
# switch back to previous dir
{ curl -LfOsS https://repo.anaconda.com/miniconda/$f ; cd -; } &&

# Use the miniconda installer to install in silent mode
bash $TMPDIR/$f -b &&

# Add miniconda to the PATH, while not enabling auto-activation in every shell
echo ". ~/miniconda${v}/etc/profile.d/conda.sh" >> ~/.bash_profile;

# Activate a virtual environment in the current shell
. ~/miniconda${v}/bin/activate

• To activate manually in another shell use ~/miniconda3/bin/activate
• To create another virtual environment and activate / list / deactivate

conda create --name project1
conda activate project1
conda info --envs
...
conda deactivate

• see more: https://conda.io/projects/conda/en/latest/user-guide/getting-started.html

The only difference is, that this will add a much bigger section to the .bash_profile, which by default auto-activates the base environment in every shell, unless you disable that, as done below.

• based on: https://docs.anaconda.com/anaconda/install/mac-os/#using-the-command-line-install
• and https://docs.anaconda.com/anaconda/install/silent-mode/

v=2; f=Miniconda${v}-latest-MacOSX-x86_64.sh; cd $TMPDIR; { curl -LfOsS https://repo.anaconda.com/miniconda/$f ; cd -; } && bash $TMPDIR/$f -b && . ~/miniconda${v}/bin/activate && conda init && conda config --set auto_activate_base false

v=3; f=Miniconda${v}-latest-MacOSX-x86_64.sh; cd $TMPDIR; { curl -LfOsS https://repo.anaconda.com/miniconda/$f ; cd -; } && bash $TMPDIR/$f -b && . ~/miniconda${v}/bin/activate && conda init && conda config --set auto_activate_base false