diff --git a/src/frontend/qt_sdl/Input.cpp b/src/frontend/qt_sdl/Input.cpp
index ed014b73..f3ad651e 100644
--- a/src/frontend/qt_sdl/Input.cpp
+++ b/src/frontend/qt_sdl/Input.cpp
@@ -226,7 +226,6 @@ bool HotkeyPressed(int id)  { return HotkeyPress   & (1<<id); }
 bool HotkeyReleased(int id) { return HotkeyRelease & (1<<id); }
 
 
-// TODO: MacOS version of this!
 // distinguish between left and right modifier keys (Ctrl, Alt, Shift)
 // Qt provides no real cross-platform way to do this, so here we go
 // for Windows and Linux we can distinguish via scancodes (but both
@@ -237,6 +236,12 @@ bool IsRightModKey(QKeyEvent* event)
     quint32 scan = event->nativeScanCode();
     return (scan == 0x11D || scan == 0x138 || scan == 0x36);
 }
+#elifdef __APPLE__
+bool IsRightModKey(QKeyEvent* event)
+{
+    quint32 scan = event->nativeVirtualKey();
+    return (scan == 0x37 || scan == 0x3A || scan == 0x3C || scan == 0x3E);
+}
 #else
 bool IsRightModKey(QKeyEvent* event)
 {