--- thread_pthread.c.orig	2022-04-12 19:11:15.000000000 +0800
+++ thread_pthread.c	2022-10-24 05:26:46.000000000 +0800
@@ -40,6 +40,10 @@
 #include <time.h>
 #include <signal.h>
 
+#if defined __APPLE__
+# include <AvailabilityMacros.h>
+#endif
+
 #if defined(HAVE_SYS_EVENTFD_H) && defined(HAVE_EVENTFD)
 #  define USE_EVENTFD (1)
 #  include <sys/eventfd.h>
@@ -1732,9 +1736,29 @@
     return INT2FIX(tid);
 #elif defined(__APPLE__)
     uint64_t tid;
-    int e = pthread_threadid_np(target_th->thread_id, &tid);
+# if (!defined(MAC_OS_X_VERSION_10_6) || \
+      (MAC_OS_X_VERSION_MAX_ALLOWED < 1060) || \
+      defined(__POWERPC__) /* never defined for PowerPC platforms */)
+    const bool no_pthread_threadid_np = true;
+#   define NO_PTHREAD_MACH_THREAD_NP 1
+# elif MAC_OS_X_VERSION_MIN_REQUIRED >= 1060
+    const bool no_pthread_threadid_np = false;
+# else
+#   if !(defined(__has_attribute) && __has_attribute(availability))
+    /* __API_AVAILABLE macro does nothing on gcc */
+    __attribute__((weak)) int pthread_threadid_np(pthread_t, uint64_t*);
+#   endif
+    /* Check weakly linked symbol */
+    const bool no_pthread_threadid_np = !&pthread_threadid_np;
+# endif
+    if (no_pthread_threadid_np) {
+        return ULL2NUM(pthread_mach_thread_np(pthread_self()));
+    }
+# ifndef NO_PTHREAD_MACH_THREAD_NP
+    int e = pthread_threadid_np(target_th->thread_id, &tid);
     if (e != 0) rb_syserr_fail(e, "pthread_threadid_np");
     return ULL2NUM((unsigned long long)tid);
+# endif
 #endif
 }
 # define USE_NATIVE_THREAD_NATIVE_THREAD_ID 1