I don't use iPhoto but with many apps, holding the option key down when you open the app will allow you to pick the "library" that the app uses for "stuff". Shut down/Quit iPhoto and try that. It will help, of course, if you know where the iPhoto library (where all the images are stored) is on your drive. I think it's normally in your "Documents" directory.
Actually, iPhoto has a "Switch to Library..." item in the File Menu, that might show you which one it's already using (a new one, no doubt) and others it "sees". Either way, there should be a "Other Library" button that will give you the standard Navigation dialog where you can get to the old User's Documents directory... assuming you have Administrator privileges.
BTW, I tried the Help function of iPhoto (9.5.1) and it claimed it could not access any Help pages.
That's just one more reason to not use the app!
Um, Jim, I think Steve wants to move everything BUT the iPhoto library to his new account.
I think the best way to do it would be to clone everything to an external drive, delete the old iPhoto library that doesn't work, then manually move the new one to the cloned drive, make sure it works, and then use Migration Assistant to move everything back to the new account. I *think* that should work.
Strange that you ask that now - I'm about to do a very similar thing this evening with my cousin's iMac. She inherited it from my late uncle, so we're now setting it up for her, as well as upgrading everything to Mavericks. I'll let you know if my recommended method works (we don't have an iPhoto issue, but there is the issue of moving stuff from an old account (his, which she'd been using) into a new account which is hers.)
How did it go.I was not able to move the modified iPhoto library back to the new user with MA. Had to go the old tried and true "Drag and Drop" method, with some authentication of folders since the mods to iPhoto came from different Users. Very tricky.
Apparently, the huge size of photo groups, not individual files, caused such a slow down of iPhoto that it was barely running. So, I had to break them into smaller groups and the import them into the new library. After which, I used iPhoto Duplicate Cleaner to get rid of most duplicates. Still some were left and I had to delete those manually. Also, when dumping iPhoto Trash, try not to have too many files there also, as it will take forever.
Believe me, after this is over with, I'm burning photo files onto CDs.