Allow macosx thread safety test on macOS11

QuLogic · QuLogic · commit 360e403e7bcd · 2021-10-05T16:56:27.000-04:00
It appears to no longer timeout on that system, and is breaking CI,
which just switched to it.
diff --git a/lib/matplotlib/tests/test_backends_interactive.py b/lib/matplotlib/tests/test_backends_interactive.py
@@ -222,8 +222,11 @@ def _test_thread_impl():
         param.marks.append(
             pytest.mark.xfail(raises=subprocess.CalledProcessError))
     elif backend == "macosx":
-        param.marks.append(
-            pytest.mark.xfail(raises=subprocess.TimeoutExpired, strict=True))
+        mac_ver = platform.mac_ver()[0]
+        if mac_ver and int(mac_ver.split('.')[0]) < 11:
+            param.marks.append(
+                pytest.mark.xfail(raises=subprocess.TimeoutExpired,
+                                  strict=True))
     elif param.values[0].get("QT_API") == "PySide2":
         param.marks.append(
             pytest.mark.xfail(raises=subprocess.CalledProcessError))
