macOS is not FreeBSD.
--- inc/stdtp.h.orig	2014-03-24 09:29:24.000000000 -0500
+++ inc/stdtp.h	2018-11-05 09:22:10.000000000 -0600
@@ -49,10 +49,6 @@
 #define _WINCE
 #endif
 
-#if defined(__APPLE__) && !defined(__FreeBSD__)
-// MAC OS X is Free BSD
-#define __FreeBSD__ 5
-#endif
 
 #ifndef _WINCE
 #include <sys/stat.h>
--- src/sync.cpp.orig	2013-02-17 13:47:31.000000000 -0600
+++ src/sync.cpp	2018-11-05 09:21:43.000000000 -0600
@@ -340,7 +340,7 @@
 
 
 
-#if (defined(__GNU_LIBRARY__) && !defined(_SEM_SEMUN_UNDEFINED)) || defined(__FreeBSD__) 
+#if (defined(__GNU_LIBRARY__) && !defined(_SEM_SEMUN_UNDEFINED)) || defined(__FreeBSD__)  || defined(__APPLE__)
 /* union semun is defined by including <sys/sem.h> */  
 #else
 union semun {