Just bought my first Apple gear. iMac and iPads for family. Downloaded some photos to the iMac via iPhoto and tried to allow other users to share the library. This caused major headaches. Prompts to repair permissions constantly appeared, even after permissions were changed. After a visit to the Apple store for a One to One session, it seems that the OS cannot provide this simple functionality; http://support.apple.com/kb/HT1198 Surely there must be a simpler way for all users of our iMac to have access to the photo library. I thought it would be a simple folder permission issue. I cannot understand why such a simple issue is so hard on this system. Would using a different photo organisation app solve the problem or is the problem due to the way the OS works?