--- static_assert.hpp-dist	2015-09-17 12:33:56.000000000 +0200
+++ static_assert.hpp	2015-09-17 12:35:10.000000000 +0200
@@ -67,7 +67,7 @@
 //
 // If the compiler warns about unused typedefs then enable this:
 //
-#if defined(__GNUC__) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 7)))
+#if defined(__GNUC__) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 7))) || (defined(__apple_build_version__) && (__apple_build_version__ >= 7000000))
 #  define BOOST_STATIC_ASSERT_UNUSED_ATTRIBUTE __attribute__((unused))
 #else
 #  define BOOST_STATIC_ASSERT_UNUSED_ATTRIBUTE