Use value instead of version macro when testing for mac OS version, since the define for the newer version may not be defined when compiling against older versions. https://bugzilla.gnome.org/show_bug.cgi?id=788402
Use value instead of version macro when testing for mac OS version, since the define for the newer version may not be defined when compiling against older versions. https://bugzilla.gnome.org/show_bug.cgi?id=788402