I just want several users to see the same photo library on one iMac computer. This is what worked:
Taken from: http://ad.hominem.org/log/2005/07/acl.php
Move the library you want to share to /Users/Shared/Pictures/iPhoto\ Library
Make a soft link
cd ~csev/Pictures
ln -s /Users/Shared/Pictures/iPhoto\ Library/ iPhoto\ Library
Turn on ACLs on:
sudo /usr/sbin/fsaclctl -p / -e
Give each account permission on the iPhoto Library
sudo chmod -R +a “drchuck allow read,write,append,delete,list,search,add_subdirectory,delete_child,file_inherit,directory_inherit” /Users/Shared/Pictures/iPhoto\ Library
sudo chmod -R +a “csev allow read,write,append,delete,list,search,add_subdirectory,delete_child,file_inherit,directory_inherit” /Users/Shared/Pictures/iPhoto\ Library
sudo chmod -R +a “brent allow read,write,append,delete,list,search,add_subdirectory,delete_child,file_inherit,directory_inherit” /Users/Shared/Pictures/iPhoto\ Library
Interestingly this page did not work – perhaps it does not work if the iPhoto library already exists:
http://www.macosxhints.com/article.php?story=20050904072808460&lsrc=osxh