Disable fused-add-mul instructions. They give a nonstandard result for some things that test_coercion complains about. The added performance is probably minimal for Python anyway.
diff --git a/Mac/Build/PythonCore.mcp b/Mac/Build/PythonCore.mcp
index 8f3bc2b..6cff596 100644
--- a/Mac/Build/PythonCore.mcp
+++ b/Mac/Build/PythonCore.mcp
Binary files differ