Sure there is! In the "System Preferences" choose "Screen Effects" and select (your) "Picture Folder", then click the "Configure" button and check the "Present slides in random order" Display Option. Now slide your mouse to a "Hot Corner" and sit back and watch the show.I miss the OS9 shareware application JPEGView. It's seemed to be the only slideshow viewer that could view pics in random order.
Is there an OSX application which can do this?