diff --git a/pyproject.toml b/pyproject.toml
index 087f6f41..539a6248 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,7 +16,7 @@ classifiers = [
   "Development Status :: 3 - Alpha",
   "Environment :: Console",
   "Intended Audience :: Developers",
-  "Operating System :: OS Independent",
+  "Operating System :: MacOS",
   "Programming Language :: Python :: 3",
   "Programming Language :: Python :: 3.12",
   "Topic :: Documentation",
diff --git a/tests/test_public_contract.py b/tests/test_public_contract.py
index c033f670..0f05ed81 100644
--- a/tests/test_public_contract.py
+++ b/tests/test_public_contract.py
@@ -164,7 +164,8 @@ def test_python_package_metadata_declares_readme_and_license():
         "License :: OSI Approved :: Apache Software License"
         not in project["classifiers"]
     )
-    assert "Operating System :: OS Independent" in project["classifiers"]
+    assert "Operating System :: MacOS" in project["classifiers"]
+    assert "Operating System :: OS Independent" not in project["classifiers"]
     assert "Topic :: Software Development :: Documentation" in project["classifiers"]