I have just checked out OpenSceneGraph trunk and built it on my mac.osgversion: 
OpenSceneGraph Library 3.1.4uname -a: Darwin 12.2.0 Darwin Kernel Version 
12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64 
x86_64XCode: Version 4.5.2 (4G2008a)
I am trying to get some software working: chapter 2 example from the 
OpenSceneGraph 3 cookbook 
(http://www.packtpub.com/openscenegrap-3-for-advanced-3d-programming-using-api-cookbook/book).In
 this example, I cannot pick the sphere or the cube as long as the code expects 
to seemodifierKeyMask & osgGA::GUIEventAdapter::MODKEY_CTRL
If I remove this condition (any left mouse click allows the method to 
continue), then the software works as designed.
Neither Control (left / right) nor Alt modifiers (left / right) are 
reported.Shift (left / right) and Command (left / right) are reported.Key 
combinations (Shift + Control) are not reported (even though, on its own, Shift 
is reported).
Here is a reference to an old discussion on the mailing list:[osg-users] 
Modifier key mask not working under OS X, by Adrian Egli OpenSceneGraph (3D) 
3dhelp at gmail.com, dated Thu Feb 21 22:23:05 PST 2008
This is either a bug that was never fixed or a regression.
What would be the way forward to address this?
Regards,
François Génolini                                         
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