Ned Deily <n...@python.org> added the comment:

In Python 3.8, the default start method for multiprocessing when run on macOS 
is now "spawn" instead of "fork".

"Changed in version 3.8: 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 bpo-33725."

----------
resolution:  -> duplicate
stage:  -> resolved
status: open -> closed
superseder:  -> Python crashes on macOS after fork with no exec
versions:  -Python 2.7, Python 3.6, Python 3.7

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue33111>
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