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[3.14] gh-150644: Tag Apple system log messages as public. (GH-150645) (#150739)

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macOS 26 changed the default visibility of "dynamic" system messages. This
changes the logging strategy to tag all messages as "public" so they are
visible in the system log without special configuration.
(cherry picked from commit 71fc4c66d3)

Co-authored-by: Russell Keith-Magee <russell@keith-magee.com>
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Miss Islington (bot) 2026-06-02 00:51:07 +02:00 • committed by GitHub
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Misc/NEWS.d/next/macOS/2026-05-31-10-40-00.gh-issue-150644.zLWyjj.rst Normal file
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@ -0,0 +1,3 @@
When system logging is enabled (with ``config.use_system_logger``, messages
are now tagged as public. This allows the macOS 26 system logger to view
messages without special configuration.

4
Python/pylifecycle.c
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@ -2972,7 +2972,9 @@ apple_log_write_impl(PyObject *self, PyObject *args)
// Pass the user-provided text through explicit %s formatting
// to avoid % literals being interpreted as a formatting directive.
os_log_with_type(OS_LOG_DEFAULT, logtype, "%s", text);
// Using {public} ensures "dynamic" string messages are visible
// in the log without special configuration.
os_log_with_type(OS_LOG_DEFAULT, logtype, "%{public}s", text);
Py_RETURN_NONE;
}