Hi all, I just upgraded to Mountain Lion on a MacBook Pro from 2010 and an iMac from 2008. A funny thing happened. When trying to set up my screen saver preferences, it was no problem to choose "iPhoto" as the source for photos my Mac chooses from when screen saving. However, on my MacBook Pro this isn't an option. When I pick choose folder, my iPhoto library is greyed out and I can't select it. How can I get my MacBook Pro to allow me to use my iPhoto library with the screen saver, like my iMac is doing?? Thanks all!