I have been using iPhoto for about 18 months. I have loads of photos in there but it has stopped working. Someone said that Apple just wants you to enjoy the experience of their products. Well I am not. The error message I am getting is "Your photo library is either in use by another application or has become unreadable." I have been using iMovie to import some stills from iPhoto so I closed everything down and restarted the computer. I had the same error. The error message suggests holding down the options key and the Command key while starting iPhoto. I did that. I have tried all four options in order. None work. Indeed Repair Thumbnails and Repair database just cause the program to exit. Rebuilding the database does not have any effect either. I am desperate to get my photos back. I have downloaded iPhoto Library Manager but that is only seeing fraction of my photos. Help, please.