Install multiple Python versions with Pyenv

Pyenv is a Python version manager. It is recommended, because it does not depend on Python, (written in Bash) and using it we can install and utilize multiple Python versions without affecting the Python version used by MacOS.

The Pyenv source code is at https://github.com/pyenv/pyenv

Install Pyenv

We will use Homebrew to install Pyenv

brew install pyenv

Install the latest stable version of Python with Pyenv

Check https://www.python.org/downloads/macos/ for the latest stable release.

pyenv install 3.9.6

Set the new Python version the default

pyenv global 3.9.6
# check if the change took effect
pyenv version

Configure your shell to use Pyenv for Python version management

Add these lines to your .bashrc, .zshrc or .bash_profile file

PATH=$(pyenv root)/shims:$PATH

if command -v pyenv 1>/dev/null 2>&1; then
  eval "$(pyenv init -)"
fi

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