From Stephan Huber, "attached you'll find a fix for Registry.cpp not using the QTKit-plugin for video-files. W/o this fix you had to preload the plugin to open movie-files."

CMakeModules/FindQuickTime.cmake

@@ -63,4 +63,10 @@ IF(APPLE)
             SET(QUICKTIME_FOUND "NO")
         ENDIF()
     ENDIF()
+    # Disable quicktime for >= 10.7, as it's officially deprecated
+    
+    IF(${OSG_OSX_SDK_NAME} STREQUAL "macosx10.7" OR ${OSG_OSX_SDK_NAME} STREQUAL "macosx10.8" OR ${OSG_OSX_SDK_NAME} STREQUAL "macosx10.9")
+        MESSAGE("disabling quicktime because it's not supported by the selected SDK ${OSG_OSX_SDK_NAME}")
+        SET(QUICKTIME_FOUND "NO")
+    ENDIF()
 ENDIF()

src/osgDB/CMakeLists.txt

@@ -133,7 +133,9 @@ IF(APPLE)
         ADD_DEFINITIONS(-DDARWIN_IMAGEIO)
     ENDIF()
 ENDIF()
-
+IF(QTKIT_FOUND)
+    ADD_DEFINITIONS(-DUSE_QTKIT)
+ENDIF()
 IF(QUICKTIME_FOUND)
     ADD_DEFINITIONS(-DUSE_QUICKTIME)
 ENDIF()

src/osgDB/Registry.cpp

@@ -317,7 +317,7 @@ Registry::Registry()
 
 #endif
 
-#if defined(DARWIN_QTKIT)
+#if defined(USE_QTKIT)
     addFileExtensionAlias("mov",  "QTKit");
     addFileExtensionAlias("mp4",  "QTKit");
     addFileExtensionAlias("mov",  "QTKit");
@@ -326,7 +326,6 @@ Registry::Registry()
     addFileExtensionAlias("mpv",  "QTKit");
     addFileExtensionAlias("m4v",  "QTKit");
     addFileExtensionAlias("3gp",  "QTKit");
-    addFileExtensionAlias("live", "QTKit");
     // Requires Perian
     addFileExtensionAlias("avi",  "QTKit");
     addFileExtensionAlias("xvid",  "QTKit");
@@ -347,8 +346,8 @@ Registry::Registry()
     addFileExtensionAlias("tga",  "qt");
     addFileExtensionAlias("flv",  "qt");
     addFileExtensionAlias("dv",   "qt");
-    #if !defined(DARWIN_QTKIT)
-
+    
+    #if !defined(USE_QTKIT)
         addFileExtensionAlias("mov",  "qt");
         addFileExtensionAlias("avi",  "qt");
         addFileExtensionAlias("mpg",  "qt");
@@ -380,7 +379,7 @@ Registry::Registry()
     // support QuickTime for Windows
     // Logic error here. It is possible for Apple to not define Quicktime and end up in
     // this Quicktime for Windows block. So add an extra check to avoid QTKit clashes.
-    #if defined(USE_QUICKTIME) && !defined(DARWIN_QTKIT)
+    #if defined(USE_QUICKTIME) && !defined(USE_QTKIT)
 
         addFileExtensionAlias("mov",  "qt");
         addFileExtensionAlias("live", "qt");