The easies way to install PyInstaller is using pip:
pip install pyinstaller
or upgrade to a newer version:
pip install --upgrade pyinstaller
To install the current development version use:
pip install https://github.com/pyinstaller/pyinstaller/archive/develop.tar.gz
Help keeping PyInstaller alive: Maintaining PyInstaller is a huge amount of work. PyInstaller development can only continue if users and companies provide sustainable funding. See Funding PyInstaller for how to support PyInstaller.
The latest stable release of PyInstaller is 4.2 (Change Log).
Release 4.2: stable, supports Python 3.5–3.9
Development: unstable, supports Python 3.6–3.9
Older (obsolete) releases can be found at the full list of releases.