My Mac is running iPhoto 9.4 but under Preferences it doesn't display My Photo Stream & Shared Photo Streams checkboxes, only Enable Photo Stream, Automatic Import, and Automatic Upload. What's wrong? (Can't see any of my Shared PS's from my iOS devices.)

Apple Support states to check the checkboxes for My Photo Stream and Shared Photo Streams, however, these options do not appear under my iPhoto 9.4.2 Photo Stream Preferences menu. I can see the regular Photo Stream under "RECENT" in my Mac's iPhoto Library display but none of the Shared Photo Streams I've set up—and am able to view—on my iPad and iPhone. Is this a bug? Am I doing something wrong? (I do have Photo Stream already checked/enabled under iCloud in System Preferences, btw.) Is there a fix or solution for this?