gh-135675: Document 10.16 vs 11.0 / 16.0 vs 26.0 behavior of platform.mac_ver() #136339
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…ython#135675) The macOS version reported in /System/Library/CoreServices/SystemVersion.plist can vary depending on what version of the macOS SDK Python was built with. This discrepancy bleeds into the output of platform.mac_ver().
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| Where macOS has changed its versioning scheme, it reports the next | ||
| logical version assuming the old scheme to applications built with any | ||
| prior macOS SDK version unless a ``SYSTEM_VERSION_COMPAT=0`` environment | ||
| variable is set. On macOS 11.0, the ``release`` field if Python is built |
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| variable is set. On macOS 11.0, the ``release`` field if Python is built | |
| variable is set, or the application is rebuild with a matching SDK. On macOS 11.0, the ``release`` field if Python is built |
| with SDK < 11 is ``'10.16'`` and on macOS 26.0, it's ``'16.0'`` unless | ||
| Python was built with SDK >= 26.0. |
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My suggestion also allows simplifying the version detail.
Possibly:
On macOS 11 or later the compatibility version reported in the
releasefield is10.16, on macOS 26 or later it is16.0.
This still isn't 100% correct. AFAIK a binary compiled with a 10.15 SDK will report the system version as 10.16 even on macOS 26.
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FWIW: I'll leave this to @ronaldoussoren to review and decide. I'm not a Mac expert. |
The macOS version reported in
/System/Library/CoreServices/SystemVersion.plistcan vary depending on what version of the macOS SDK Python was built with. This discrepancy bleeds into the output ofplatform.mac_ver().Closes #135675.
platform.mac_ver()returns macOS version of 16.0 instead of 26.0 on Tahoe #135675📚 Documentation preview 📚: https://cpython-previews--136339.org.readthedocs.build/