The return value can be ``'fork'``, ``'spawn'``, ``'forkserver'``
or ``None``. See :ref:`multiprocessing-start-methods`.
-.. versionchanged:: 3.8
+ .. versionadded:: 3.4
- On macOS, the *spawn* start method is now the default. The *fork* start
- method should be considered unsafe as it can lead to crashes of the
- subprocess. See :issue:`33725`.
+ .. versionchanged:: 3.8
- .. versionadded:: 3.4
+ On macOS, the *spawn* start method is now the default. The *fork* start
+ method should be considered unsafe as it can lead to crashes of the
+ subprocess. See :issue:`33725`.
.. function:: set_executable(executable)