pip3 en macOS (Homebrew): evitar el error externally-managed-environment instalando con pipx

Instalar programas/script pyhton con pip3 en entorno Mac con Homebrew
Muchas veces en mac quieres instalar algo con 
pip pero tu instalación de 
pip3 ewsta mantenida por Homebrew y obtines el error de abajo
pip3 install "headroom-ai[all]"
error: externally-managed-environment
× This environment is externally managed
╰─> To install Python packages system-wide, try brew install
    xyz, where xyz is the package you are trying to
    install.
    If you wish to install a Python library that isn't in Homebrew,
    use a virtual environment:
    python3 -m venv path/to/venv
    source path/to/venv/bin/activate
    python3 -m pip install xyz
    If you wish to install a Python application that isn't in Homebrew,
    it may be easiest to use 'pipx install xyz', which will manage a
    virtual environment for you. You can install pipx with
    brew install pipx
    You may restore the old behavior of pip by passing
    the '--break-system-packages' flag to pip, or by adding
    'break-system-packages = true' to your pip.conf file. The latter
    will permanently disable this error.
    If you disable this error, we STRONGLY recommend that you additionally
    pass the '--user' flag to pip, or set 'user = true' in your pip.conf
    file. Failure to do this can result in a broken Homebrew installation.
    Read more about this behavior here: <https://peps.python.org/pep-0668/>
note: If you believe this is a mistake, please contact your Python installation or OS distribution provider. You can override this, at the risk of breaking your Python installation or OS, by passing --break-system-packages.
hint: See PEP 668 for the detailed specification.
Resumen
This environment is externally managed
╰─> To install Python packages system-wide, try brew install
    xyz, where xyz is the package you are trying to
    install.
Solución
Usar 
pipx
brew install pipx
pipx install "headroom-ai[all]"
  installed package headroom-ai 0.26.0, installed using Python 3.14.6
  These apps are now available
    - headroom
done! ✨ 🌟 ✨
Aviso
Esta documentación y su contenido, no implica que funcione en tu caso o determinados casos.
También implica que tienes conocimientos sobre lo que trata, y que en cualquier caso tienes copias de seguridad.
El contenido el contenido se entrega, tal y como está, sin que ello implique ningún obligación ni responsabilidad por parte de Castris
Si necesitas soporte profesional puedes contratar con Castris soporte profesional.