Add Universal2 versions of python for use with PyInstaller

[cmot17]

Description:
https://pyinstaller.readthedocs.io/en/stable/feature-notes.html#macos-multi-arch-support
I believe that PyInstaller supports creating universal2 binaries for MacOS from an x86 machine - it just needs to be running the universal2 version of python.
Justification:

This would be really useful to build apps compatible with Apple Silicon.

[nikita-bykov]

Hello @cmot17! Thanks for your feature request. We will look at it.

[nikita-bykov]

Hey @cmot17!
The same feature request already exists in the virtual-environment repository: Add universal2 builds of Python to actions/setup-python #4133.
The PR is also open for it: Compile in universal2 mode for macOS Python >= 3.9.1. #114.
You can find more context in the links above.

[rtibbles]

PR actions/python-versions#114 was merged and then reverted a month later with actions/python-versions#175, so this issue could still do with being resolved.

As it seems that some were unhappy with this being the default behaviour, it would be useful if this could be an optional flag for setup-python on MacOS runners.

[albertosottile]

I can confirm that this is still an outstanding issue (after the revert performed in actions/python-versions#175). Please consider this feature as its lack is preventing developers from building universal2 wheels and projects, which is what Apple recommends.

[albertosottile]

Further reasons for this need can be found in the original issue here: actions/runner-images#4133 This issue was closed when the feature was originally implemented, but not reopened when it was reverted.

[IvanZosimov]

Hi, @cmot17 👋 Starting from the Python 3.11.0-rc.2 the setup-python action installs official universal2 for macOS, so the feature you requested is implemented.

Now, I'm going to close this issue, If you have any additional questions feel free to ping us.