I have Logic Pro 9.1.8 and OSX 10.8.4. When I try to listen to or work on files I created last year I get the message that the audio files cannot be found! Searching for the files does not find them, and continuing does not activate them! How do I correct this problem? Does this have something to do with updates needed for Logic Pro? or problems with updates with OSX??
If you know the place where this audio files reside, then point the app to there manually when opening this problematic projects. A Spotlight search is also a possibility. If only the file location differs and not the file name you should be fine.
If somehow the name of the audio files has changed, you should prepare yourself for a rather "nasty" restore job.