Index: Python-3.9.7/Modules/_ctypes/callproc.c
===================================================================
--- Python-3.9.7.orig/Modules/_ctypes/callproc.c
+++ Python-3.9.7/Modules/_ctypes/callproc.c
@@ -1452,7 +1452,7 @@ copy_com_pointer(PyObject *self, PyObjec
 #ifdef __APPLE__
 #ifdef HAVE_DYLD_SHARED_CACHE_CONTAINS_PATH
 #define HAVE_DYLD_SHARED_CACHE_CONTAINS_PATH_RUNTIME \
-    __builtin_available(macOS 11.0, iOS 14.0, tvOS 14.0, watchOS 7.0, *)
+    __builtin_available(macOS 10.16, iOS 14.0, tvOS 14.0, watchOS 7.0, *)
 #else
 // Support the deprecated case of compiling on an older macOS version
 static void *libsystem_b_handle;