Index: include/__config
===================================================================
--- include/__config
+++ include/__config
@@ -848,6 +848,18 @@
 #define _DECLARE_C99_LDBL_MATH 1
 #endif
 
+#if defined(__APPLE__)
+# if !defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && \
+     defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__)
+#   define __MAC_OS_X_VERSION_MIN_REQUIRED __ENVIROMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
+# endif
+# if defined(__MAC_OS_X_VERSION_MIN_REQUIRED)
+#   if __MAC_OS_X_VERSION_MIN_REQUIRED < 1060
+#     define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION
+#   endif
+# endif
+#endif // defined(__APPLE__)
+
 #if defined(__APPLE__) || defined(__FreeBSD__)
 #define _LIBCPP_HAS_DEFAULTRUNELOCALE
 #endif
Index: include/new
===================================================================
--- include/new
+++ include/new
@@ -101,8 +101,9 @@
 # define _LIBCPP_HAS_NO_SIZED_DEALLOCATION
 #endif
 
-#if !(defined(_LIBCPP_BUILDING_NEW) || _LIBCPP_STD_VER > 14 || \
-    (defined(__cpp_aligned_new) && __cpp_aligned_new >= 201606))
+#if !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION) && \
+    (!(defined(_LIBCPP_BUILDING_NEW) || _LIBCPP_STD_VER > 14 || \
+    (defined(__cpp_aligned_new) && __cpp_aligned_new >= 201606)))
 # define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION
 #endif
 
Index: src/new.cpp
===================================================================
--- src/new.cpp
+++ src/new.cpp
@@ -151,6 +151,8 @@
     ::operator delete[](ptr);
 }
 
+#if !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION)
+
 _LIBCPP_WEAK
 void *
 operator new(std::size_t size, std::align_val_t alignment) _THROW_BAD_ALLOC
@@ -275,6 +277,8 @@
     ::operator delete[](ptr, alignment);
 }
 
+#endif // !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION)
+
 #endif // !__GLIBCXX__
 
 namespace std