From Stephan Huber and Mathieu Marache, "attached you'll find framework support for os x via cmake. Please credit

Mathieu Marache, he added the last missing piece to this puzzle.

I think it is safe to commit these changes to trunk, as the traditional
way via dylibs should work as before.

Here's some more info how to get frameworks:

With these modifications it is possible to compile frameworks on OS X,
when you set the Cmake-option OSG_COMPILE_FRAMEWORKS to true. If you
want to embed the frameworks in your app-bundle make sure to set
OSG_COMPILE_FRAMEWORKS_INSTALL_NAME_DIR accordingly.

You'll have to build the install-target of the generated xcode-projects
as this sets the install_name_dirs of the frameworks and plugins."

CMakeModules/ModuleInstall.cmake

@@ -29,12 +29,25 @@ INSTALL(
     TARGETS ${LIB_NAME}
     RUNTIME DESTINATION ${INSTALL_BINDIR} COMPONENT libopenscenegraph
     LIBRARY DESTINATION ${INSTALL_LIBDIR} COMPONENT libopenscenegraph
-    ARCHIVE DESTINATION ${INSTALL_ARCHIVEDIR} COMPONENT libopenscenegraph-dev
+    ARCHIVE DESTINATION ${INSTALL_ARCHIVEDIR} COMPONENT libopenscenegraph-dev    
+    FRAMEWORK DESTINATION /Library/Frameworks
 )
 
-# FIXME: Do not run for OS X framework
-INSTALL(
-    FILES        ${LIB_PUBLIC_HEADERS}
-    DESTINATION ${INSTALL_INCDIR}/${LIB_NAME}
-    COMPONENT libopenscenegraph-dev
-)
+IF(NOT OSG_COMPILE_FRAMEWORKS)
+    INSTALL (
+        FILES        ${LIB_PUBLIC_HEADERS}
+        DESTINATION ${INSTALL_INCDIR}/${LIB_NAME}
+        COMPONENT libopenscenegraph-dev
+    )
+ELSE()
+    SET(CMAKE_BUILD_WITH_INSTALL_RPATH TRUE)
+    SET(CMAKE_INSTALL_RPATH "${OSG_COMPILE_FRAMEWORKS_INSTALL_NAME_DIR}")
+    
+    SET_TARGET_PROPERTIES(${LIB_NAME} PROPERTIES
+         FRAMEWORK TRUE
+         FRAMEWORK_VERSION ${OPENSCENEGRAPH_VERSION}
+         PUBLIC_HEADER  "${LIB_PUBLIC_HEADERS}"
+         INSTALL_NAME_DIR "${OSG_COMPILE_FRAMEWORKS_INSTALL_NAME_DIR}"
+    )
+    # MESSAGE("${OSG_COMPILE_FRAMEWORKS_INSTALL_NAME_DIR}")
+ENDIF()