[issue32726] macOS installer and framework enhancements and changes for 3.7.0 and 3.6.5

[Ned Deily]

Change by Ned Deily <nad at python.org>:


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pull_requests: +6006
stage: backport needed -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32726>
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