Darwin has wchar_h and wctypes_h.
El Capitan needs <sys/types.h> for ino_t.

--- CPP/myWindows/config.h
+++ CPP/myWindows/config.h
@@ -5,7 +5,7 @@
   #define FILESYSTEM_IS_CASE_SENSITIVE 1
 #endif
 
-  #if !defined(ENV_MACOSX) && !defined(ENV_BEOS)
+  #if !defined(ENV_BEOS)
 
     /* <wchar.h> */
     /* ENV_HAVE_WCHAR__H and not ENV_HAVE_WCHAR_H to avoid warning with wxWidgets */
--- CPP/myWindows/StdAfx.h
+++ CPP/myWindows/StdAfx.h
@@ -32,7 +32,7 @@
 #include <errno.h>
 #include <math.h>
 
-#ifdef __NETWARE__
+#if defined(__NETWARE__) || defined(__MACH__)
 #include <sys/types.h>
 #endif