--- Python/thread_pthread.h.orig	2020-03-07 12:42:06.000000000 -0800
+++ Python/thread_pthread.h	2020-03-07 12:48:22.000000000 -0800
@@ -325,9 +325,19 @@
 {
     if (!initialized)
         PyThread_init_thread();
 #ifdef __APPLE__
     uint64_t native_id;
-    (void) pthread_threadid_np(NULL, &native_id);
+#if MAC_OS_X_VERSION_MAX_ALLOWED < 1060
+    native_id = pthread_mach_thread_np(pthread_self());
+#elif MAC_OS_X_VERSION_MIN_REQUIRED < 1060
+    if (&pthread_threadid_np) {
+        (void) pthread_threadid_np(NULL, &native_id);
+    } else {
+        native_id = pthread_mach_thread_np(pthread_self());
+    }
+#else
+    (void) pthread_threadid_np(NULL, &native_id);
+#endif
 #elif defined(__linux__)
     pid_t native_id;
     native_id = syscall(SYS_gettid);