diff --git a/src/scenedit/scen.fileio.cpp b/src/scenedit/scen.fileio.cpp
index 5dd874e3..96abf699 100644
--- a/src/scenedit/scen.fileio.cpp
+++ b/src/scenedit/scen.fileio.cpp
@@ -154,8 +154,7 @@ void writeScenarioToXml(ticpp::Printer&& data, cScenario& scenario) {
 	data.OpenElement("creator");
 	data.PushElement("type", "oboe");
 	data.PushElement("version", scenario.format_ed_version());
-	// TODO: fill <os> element
-	data.PushElement("os", "");
+	data.PushElement("os", get_os_version());
 	data.CloseElement("creator");
 	data.OpenElement("game");
 	data.PushElement("num-towns", scenario.towns.size());
diff --git a/src/tools/winutil.hpp b/src/tools/winutil.hpp
index 4237a8e1..9682d2aa 100644
--- a/src/tools/winutil.hpp
+++ b/src/tools/winutil.hpp
@@ -23,6 +23,8 @@ void setWindowFloating(sf::Window& win, bool floating);
 void init_fileio();
 void launchURL(std::string url);
 
+std::string get_os_version();
+
 fs::path nav_get_party();
 fs::path nav_put_party(fs::path def = "");
 fs::path nav_get_scenario();
diff --git a/src/tools/winutil.mac.mm b/src/tools/winutil.mac.mm
index 3d3535fd..6814f592 100644
--- a/src/tools/winutil.mac.mm
+++ b/src/tools/winutil.mac.mm
@@ -10,6 +10,7 @@
 #include <Cocoa/Cocoa.h>
 #include <AppKit/NSBitmapImageRep.h>
 #include <SFML/Graphics/RenderWindow.hpp>
+#include <sstream>
 
 // TODO: I'm sure there's a better way to do this (maybe one that's keyboard layout agnostic)
 // The proper way would involve use of the TextEntered event
@@ -89,6 +90,14 @@ char keyToChar(sf::Keyboard::Key key, bool isShift) {
 	return 0;
 }
 
+std::string get_os_version() {
+	NSProcessInfo* info = [NSProcessInfo processInfo];
+	std::ostringstream os;
+	os << "Apple Mac OS X ";
+	os << [[info operatingSystemVersionString] cStringUsingEncoding:NSASCIIStringEncoding];
+	return os.str();
+}
+
 void makeFrontWindow(sf::Window& win) {
 	sf::WindowHandle handle = win.getSystemHandle();
 	id nsHandle = id(handle);