When I try to enable photo stream in iPhoto it hangs and nothing gets updated. I have a Early 2008 17" Mac Book Pro, does photostream not work for these machines? I have try doing it in system preferences before opening up iPhoto and also within iPhoto. I reinstalled my iPhoto and di all of the updates to put on a clean version but it still hangs when trying to enable photostream. It shows that it is enabled in system preferences under iCloud but not when you try to check under preferences in iPhoto. Has anyone heard a problem with this?