I have a 2.6 GHz i7 15 inch Macbook Pro (June 11 2012) running Mountain Lion When I activate a screensaver using photos, it displays "Loading Pictures" for 15+ seconds before the screensaver actually starts. This is teh case with any photo screensaver I choose. Prior to upgrading to Mountain Lion this time was under a few seconds. Is there a cache or plst that can be cleared or deleted to fix this? I'm using an Aperture album as my source, however I tried switching to a normal folder containing pictures on the desktop, but that also resulted in this long loading time. Any help or ideas are appreciated (And will hopefully calm my OCD about this haha).