Source
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--- ACE_wrappers/ace/config-macosx-sierra.h.orig 2017-09-07 00:02:07.000000000 -0700
+++ ACE_wrappers/ace/config-macosx-sierra.h 2017-09-17 12:47:10.000000000 -0700
#include "ace/config-macosx-elcapitan.h"
+#undef ACE_LACKS_CLOCKID_T
+#undef ACE_LACKS_CLOCK_MONOTONIC
+#undef ACE_LACKS_CLOCK_REALTIME
+
#endif // ACE_CONFIG_MACOSX_SIERRA_H