use wxMac provided wxGetOsDescription with Apple DevTools

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13705 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mac/utils.cpp

@@ -486,5 +486,11 @@ wxWindow* wxFindWindowAtPoint(const wxPoint& pt)
 
 wxString wxGetOsDescription()
 {
-  return "MacOS" ; //TODO:define further
-}
+#ifdef WXWIN_OS_DESCRIPTION
+    // use configure generated description if available
+    return wxString("MacOS (") + WXWIN_OS_DESCRIPTION + wxString(")");
+#else
+    return "MacOS" ; //TODO:define further
+#endif
+}
+