Adopt os-log based logging.

.gitignore

@@ -50,8 +50,10 @@ logs/
 .specify/templates
 .specify/extensions.yml
 .specify/extensions
+.specify/feature.json
 .specify/init-options.json
 .specify/integration.json
 .specify/integrations
 .specify/workflows
 .specify/workflow.yml
+specs

automation/src/automation/bootstraps/pyside6.py

@@ -61,6 +61,6 @@ def pyproject_table_macOS(self):
 min_os_version = "13.0"
 requires = [
     "PySide6-Addons~=6.8",
-    "std-nslog~=1.0.3",
+    "std-nslog~=2.0.0",
 ]
 """

changes/2877.bugfix.md

@@ -0,0 +1 @@
+Briefcase is now able to display application logs when running apps under macOS 26. If you are experiencing this problem, you need to either (a) upgrade `std-nslog` to 2.0.0+, or target your application at Python 3.14 (or newer).

src/briefcase/bootstraps/pygame.py

@@ -67,7 +67,7 @@ def pyproject_table_macOS(self):
         return """\
 universal_build = true
 requires = [
-    "std-nslog~=1.0.3",
+    "std-nslog~=2.0.0",
 ]
 """
 

src/briefcase/bootstraps/pyside6.py

@@ -63,7 +63,7 @@ def pyproject_table_macOS(self):
 # Pyside 6.10 (required for Python 3.14 support) enforces a macOS 13 minimum.
 min_os_version = "13.0"
 requires = [
-    "std-nslog~=1.0.3",
+    "std-nslog~=2.0.0",
 ]
 """
 

src/briefcase/bootstraps/toga.py

@@ -51,7 +51,7 @@ def pyproject_table_macOS(self):
 universal_build = true
 requires = [
     "toga-cocoa~=0.5.0",
-    "std-nslog~=1.0.3",
+    "std-nslog~=2.0.0",
 ]
 """
 
@@ -206,7 +206,6 @@ def pyproject_table_iOS(self):
         return """\
 requires = [
     "toga-iOS~=0.5.0",
-    "std-nslog~=1.0.3",
 ]
 """
 

src/briefcase/integrations/cookiecutter.py

@@ -23,6 +23,10 @@ def py_libtag(obj):
             """A Python version library tag (311)"""
             return "".join(obj.split(".")[:2])
 
+        def minor_version(obj):
+            """The Python minor version, as an integer (e.g., 11)"""
+            return int(obj.split(".")[1])
+
         def nuget_version(obj):
             """A Python version in Nuget format (3.14.0-rc1)."""
             parts = obj.split(".")[:3]
@@ -32,6 +36,7 @@ def nuget_version(obj):
 
         environment.filters["py_tag"] = py_tag
         environment.filters["py_libtag"] = py_libtag
+        environment.filters["minor_version"] = minor_version
         environment.filters["nuget_version"] = nuget_version
 
 

src/briefcase/platforms/iOS/xcode.py

@@ -625,7 +625,13 @@ def run_app(
                 "Uninstalling any existing app version..."
             ) as keep_alive,
             self.tools.subprocess.Popen(
-                ["xcrun", "simctl", "uninstall", udid, app.bundle_identifier]
+                [
+                    "xcrun",
+                    "simctl",
+                    "uninstall",
+                    udid,
+                    app.bundle_identifier,
+                ]
             ) as uninstall_popen,
         ):
             while (ret_code := uninstall_popen.poll()) is None:
@@ -641,7 +647,13 @@ def run_app(
         with (
             self.console.wait_bar(f"Installing new {label} version...") as keep_alive,
             self.tools.subprocess.Popen(
-                ["xcrun", "simctl", "install", udid, self.binary_path(app)]
+                [
+                    "xcrun",
+                    "simctl",
+                    "install",
+                    udid,
+                    self.binary_path(app),
+                ]
             ) as install_popen,
         ):
             while (ret_code := install_popen.poll()) is None:
@@ -661,7 +673,8 @@ def run_app(
         #   and for native NSLog() calls in the bootstrap binary
         # Case (2) works when the standard library is dynamically linked,
         #   and ctypes (which handles the NSLog integration) is an
-        #   extension module.
+        #   extension module. It also catches the case for the CPython
+        #   builtin behavior of redirecting to the system log.
         # It's not enough to filter on *just* the processImagePath,
         # as the process will generate lots of system-level messages.
         # We can't filter on *just* the senderImagePath, because other
@@ -679,10 +692,13 @@ def run_app(
                 "--predicate",
                 (
                     f'senderImagePath ENDSWITH "/{app.formal_name}"'
-                    f' OR (processImagePath ENDSWITH "/{app.formal_name}"'
-                    ' AND (senderImagePath ENDSWITH "-iphonesimulator.so"'
-                    ' OR senderImagePath ENDSWITH "-iphonesimulator.dylib"'
-                    ' OR senderImagePath ENDSWITH "_ctypes.framework/_ctypes"))'
+                    f'OR (processImagePath ENDSWITH "/{app.formal_name}"'
+                    '  AND (senderImagePath ENDSWITH "-iphonesimulator.so"'
+                    '    OR senderImagePath ENDSWITH "-iphonesimulator.dylib"'
+                    '    OR senderImagePath ENDSWITH "_ctypes.framework/_ctypes"'
+                    '    OR senderImagePath ENDSWITH "/Python"'
+                    "  )"
+                    ")"
                 ),
             ],
             stdout=subprocess.PIPE,

src/briefcase/platforms/macOS/__init__.py

@@ -549,7 +549,10 @@ def run_gui_app(
                 (
                     f'senderImagePath=="{sender}"'
                     f' OR (processImagePath=="{sender}"'
-                    ' AND senderImagePath=="/usr/lib/libffi.dylib")'
+                    ' AND (senderImagePath=="/usr/lib/libffi.dylib" '
+                    '   OR senderImagePath ENDSWITH "/Python" '
+                    '   OR senderImagePath ENDSWITH ".abi3.so")'
+                    " )"
                 ),
             ],
             stdout=subprocess.PIPE,

src/briefcase/platforms/macOS/filters.py

@@ -4,8 +4,10 @@
 
 MACOS_LOG_PREFIX_REGEX = re.compile(
     r"\d{4}-\d{2}-\d{2} (?P<timestamp>\d{2}:\d{2}:\d{2}.\d{3}) Df (.*?)\[.*?:.*?\]"
-    r"(?P<subsystem>( \(libffi\.dylib\))|("
-    r" \(_ctypes(\.cpython-3\d{1,2}-.*?\.(so|dylib))?\)))? (?P<content>.*)"
+    r"(?P<subsystem>( \(libffi\.dylib\))|( \(Python\))"
+    r"|( \(_ctypes(\.cpython-3\d{1,2}-.*?\.(so|dylib))?\))"
+    r"|( \(_oslog_shim\..*?\.(so|dylib)?\))"
+    r")? (?P<content>.*)"
 )
 
 

tests/commands/new/test_build_gui_context.py

@@ -66,7 +66,7 @@ def main():
 universal_build = true
 requires = [
     "toga-cocoa~=0.5.0",
-    "std-nslog~=1.0.3",
+    "std-nslog~=2.0.0",
 ]
 """,
         "pyproject_table_linux": """\
@@ -203,7 +203,6 @@ def main():
         "pyproject_table_iOS": """\
 requires = [
     "toga-iOS~=0.5.0",
-    "std-nslog~=1.0.3",
 ]
 """,
         "pyproject_table_android": '''\
@@ -414,7 +413,7 @@ def main():
 # Pyside 6.10 (required for Python 3.14 support) enforces a macOS 13 minimum.
 min_os_version = "13.0"
 requires = [
-    "std-nslog~=1.0.3",
+    "std-nslog~=2.0.0",
 ]
 """,
         "pyproject_table_linux": """\
@@ -567,7 +566,7 @@ def main():
         "pyproject_table_macOS": """\
 universal_build = true
 requires = [
-    "std-nslog~=1.0.3",
+    "std-nslog~=2.0.0",
 ]
 """,
         "pyproject_table_linux": """\

tests/integrations/cookiecutter/test_PythonVersionExtension.py

@@ -53,6 +53,30 @@ def test_py_libtag(value, expected):
     assert env.filters["py_libtag"](value) == expected
 
 
+@pytest.mark.parametrize(
+    ("value", "expected"),
+    [
+        # Single digit minor
+        ("3.8.4.dev5", 8),
+        ("3.8.4a1", 8),
+        ("3.8.4b2", 8),
+        ("3.8.4rc3", 8),
+        ("3.8.4.post6", 8),
+        # Two digit minor
+        ("3.11.4.dev5", 11),
+        ("3.11.4a1", 11),
+        ("3.11.4b2", 11),
+        ("3.11.4rc3", 11),
+        ("3.11.4.post6", 11),
+    ],
+)
+def test_minor_version(value, expected):
+    env = MagicMock()
+    env.filters = {}
+    PythonVersionExtension(env)
+    assert env.filters["minor_version"](value) == expected
+
+
 @pytest.mark.parametrize(
     ("value", "expected"),
     [