Definitely,

I went to add tr1 on mac, and realized we're already doing it. From
export/OpenColorIO/OpenColorTypes.h,

#ifdef __APPLE__
#include <tr1/memory>
#define OCIO_SHARED_PTR std::tr1::shared_ptr
#define OCIO_DYNAMIC_POINTER_CAST std::tr1::dynamic_pointer_cast
#else
#include <boost/shared_ptr.hpp>
#define OCIO_SHARED_PTR boost::shared_ptr
#define OCIO_DYNAMIC_POINTER_CAST boost::dynamic_pointer_cast
#endif

So I'll have to see why this didnt work on OSX without boost. Looks
like it all should have worked...

-- Jeremy