def METHOD_NAME():
    pv_system = platform.system()
    if pv_system not in {'Darwin', 'Linux', 'Windows'}:
        raise ValueError("Unsupported system '%s'." % pv_system)
    if pv_system == 'Linux':
        pv_machine = _pv_linux_machine(platform.machine())
    else:
        pv_machine = platform.machine()
    return pv_system, pv_machine