Fix macos error

- Closes google#398

Signed-off-by: Andy Neff <andy@visionsystemsinc.com>

CMakeLists.txt

@@ -67,7 +67,13 @@ if (WITH_PYTHON)
     find_package(SWIG 4.0)
     # Use Python3_ROOT_DIR to help find python3, if the correct location is not
     # being found by default.
-    find_package(Python3 COMPONENTS Interpreter Development.Module)
+    if (${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+        # Workaround for issue https://github.com/google/s2geometry/issues/398
+        # Macos requires libpython3.13.dylib and does not get it with .Module
+        find_package(Python3 COMPONENTS Interpreter Development)
+    else()
+        find_package(Python3 COMPONENTS Interpreter Development.Module)
+    endif()
 endif()
 
 if (MSVC)