Hi all, Recently my Slideshow screen saver gets stuck at "Loading Photos..." I can't say for sure exactly when I started noticing it but I'll say at least 2 weeks. The most I've waited was 10 minutes to see if it was just taking longer to load vs. it's a real problem. I'll say it's a real problem. Here are other details I can think of: I have a late 2012 i7 27" iMac with a 768gb SSD and 24gb of RAM (the 8gb factory installed and 16gb Crucial after market) Mountain Lion is up-to-date at 10.8.4 My screensaver is set to kick in after 20 minutes After initially logging in, the first few times the screensaver kicks in the slide show does start. But after a few hours it stops being able to load the photos, getting stuck at the "Loading Photos..." message. This happens even when there are no user applications running At first I was rebooting to fix the problem. But actually logging out and back in was good enough. However the problem comes back after a few hours after doing either so neither was a permanent solution. Getting stuck at "Loading Photos..." also happens when I go to System Preferences, go to Desktop & Screen Saver, and try to preview the slide show from there I use an iPhoto album as the slide show source. It is a smart album made up of 3 other albums. There are currently about 25k photos total, with one of the albums having over 15k. The full iPhoto library is about 260gb, the album I use is about 125gb. I've done this for several years and haven't seen a problem until now. Thinking it was an issue with the iPhoto library I've fully rebuilt it a few times. No luck. Many 1000s of the photos in the library are stored in a NAS. I thought that could be it, but when I tried using /Library/Desktop Pictures which is in my localdisk the issue happens with that as well. Pretty much when the problem starts it doesn't matter what I use as the source. So I don't think it's because the size of my iPhoto library has reached the tipping point nor is it the NAS. I've tried a few times to delete the com.apple.screensaver.* files in ~/Library/Preferences and then rebooted. The problem persists. It happens whether the machine goes to sleep or only the screen goes to sleep. Can someone give me pointers on what else I can do to try to track down the problem? Thanks in advance.