I just updated to OS X Mavericks. I am trying to set up my Screen Saver to use photos from my iPhotos library but it is not an option--iPhotos is grayed out when I open up the folder. I have tried several ways to link to no avail. What do I need to do to add iPhotos as an option to Screen Saver--it is an option for Desktop. Thank you for any help or ideas.