I recently received a newer iMac with updated software. I transferred my photos from my old MacBook (with iPhoto 8) to my new iMac. However, now when I attempt to access iPhoto on my iMac, I receive the message: "You have made changes to your photo library using a newer version of iPhoto. Please quit and use the latest version of iPhoto." I'm not sure what to do and I would appreciate any and all help.
Option 1
Back Up and try rebuild the library: hold down the command and option (or alt) keys while launching iPhoto. Use the resulting dialogue to rebuild. Choose to Repair Database. If that doesn't help, then try again, this time using Rebuild Database.
If that fails:
Option 2
Download iPhoto Library Manager and use its rebuild function. (In early versions of Library Manager it's the File -> Rebuild command. In later versions it's under the Library menu.)
This will create an entirely new library. It will then copy (or try to) your photos and all the associated metadata and versions to this new Library, and arrange it as close as it can to what you had in the damaged Library. It does this based on information it finds in the iPhoto sharing mechanism - but that means that things not shared won't be there, so no slideshows, books or calendars, for instance - but it should get all your events, albums and keywords, faces and places back.
Because this process creates an entirely new library and leaves your old one untouched, it is non-destructive, and if you're not happy with the results you can simply return to your old one.
Regards
TD
What versions of OS X and iPhoto do you have?
iPhoto Botched Upgrade
