As of writing, macOS Catalina ships with Python 2.7.2 and Python 3.7.6, the latest version of Anaconda runs at Python 3.7.6 and the latest stable release of Python on python.org is 3.8.4. Meanwhile, HomeBrew is offering 3.8.3 and a beta of 3.9 and 3.10; as well as several versions of Anaconda.
So, what should you install?
In short, pyenv, a utility that lets you easily switch between and install multiple versions of Python.
Install XCode command line tools
copy the installation command from brew.sh
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
brew install pyenv
list available versions to install
pyenv install --list
install the version you require
pyenv install 3.8.3
Edit your .zprofile
Add the following lines to your .zprofile
if command -v pyenv 1>/dev/null 2>&1; then eval "$(pyenv init -)" fi
This script initialises pyenv
Re-run your .zprofile
Now test your python installation
which python # /Users/johndunning/.pyenv/shims/python
python --version # Python 3.8.3
pip --version # pip 19.2.3 from /Users/johndunning/.pyenv/versions/3.8.3/lib/python3.8/site-packages/pip (python 3.8)
use pyenv to manage your python and anaconda installations