I am developing using OpenSceneGraph. I installed it from a user-runnable installer.
When I try to compile an application using OpenSceneGraph, I have this error :
Lexical or preprocessor error : Include cannot be found for all <osg/*> includes like <osg/AnimationPath>.
The file is available here /Library/Frameworks/osg.framework/Versions/92/Headers/XXXX So following this solution on how to "add existing frameworks" to the new Xcode, I added osg.framework to the project.

any idea is a welcome.
I am using :
- IDE Xcode 4.5
- Clang 4.1
- OS X Mountain Lion