diff --git a/src/CMakeLists.osx.cmake b/src/CMakeLists.osx.cmake
index f7a502f47..97a40d265 100644
--- a/src/CMakeLists.osx.cmake
+++ b/src/CMakeLists.osx.cmake
@@ -28,14 +28,17 @@ if (APPLE)
   # 9.8.0  -> 10.5/Leopard
   # 10.4.0 -> 10.6/Snow Leopard
   # 11.x.x -> Lion
+  # 12.x.x -> Mountain Lion
   string(REGEX MATCH "[0-9]+" DARWIN_VERSION ${CMAKE_HOST_SYSTEM_VERSION})
-  if (DARWIN_VERSION GREATER 10)
+  if (DARWIN_VERSION GREATER 11)
+    SET(MOUNTAIN_LION 1)
+  elseif (DARWIN_VERSION GREATER 10)
     SET(LION 1)
   elseif (DARWIN_VERSION GREATER 9)
     SET(SNOW_LEOPARD 1)
   elseif (DARWIN_VERSION GREATER 8)
     SET(LEOPARD 1)
-  endif (DARWIN_VERSION GREATER 10)
+  endif (DARWIN_VERSION GREATER 11)
 
 # Use two different sparkle update tracks for debug and release
 # We have to change the URL in the Info.plist file :-/
diff --git a/src/mac/TomahawkApp_Mac.mm b/src/mac/TomahawkApp_Mac.mm
index 3d856ba13..cc50a017f 100644
--- a/src/mac/TomahawkApp_Mac.mm
+++ b/src/mac/TomahawkApp_Mac.mm
@@ -240,7 +240,7 @@ void Tomahawk::checkForUpdates() {
 #endif
 }
 
-#ifdef LION
+#if defined(LION) || defined(MOUNTAIN_LION)
 #define SET_LION_FULLSCREEN NSWindowCollectionBehaviorFullScreenPrimary
 #define LION_FULLSCREEN_ENTER_NOTIFICATION_VALUE NSWindowWillEnterFullScreenNotification
 #define LION_FULLSCREEN_EXIT_NOTIFICATION_VALUE NSWindowDidExitFullScreenNotification