Index: include/__config
===================================================================
--- include/__config
+++ include/__config
@@ -1100,17 +1100,20 @@
 // The Apple, glibc, and Bionic implementation of pthreads implements
 // pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32
 // mutexes have no destroy mechanism.
-// TODO(EricWF): Enable this optimization on Apple and Bionic platforms after
+// TODO(EricWF): Enable this optimization on Bionic platforms after
 // speaking to their respective stakeholders.
-#if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) \
+#if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) \
+     && (defined(__GLIBC__) || defined(__APPLE__))) \
   || defined(_LIBCPP_HAS_THREAD_API_WIN32)
 # define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION
 #endif
 
-// Destroying a condvar is a nop on Windows.
+// Destroying a condvar is a nop on Windows and with certain pthread
+// implementations.
 // TODO(EricWF): This is potentially true for some pthread implementations
 // as well.
-#if defined(_LIBCPP_HAS_THREAD_API_WIN32)
+#if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__APPLE__)) \
+  || defined(_LIBCPP_HAS_THREAD_API_WIN32)
 # define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION
 #endif