Raphael has a MacBook Pro running OS X and he's getting an error in GarageBand. Leo says it sounds like a RAM error, and it could be telling Raphael that his Mac is a little slow for the music project he's working on. When he continues to add tracks, it takes more memory. One solution may be to download the previous version, Garage Band 6. Apple is still offering it for download. Turning off plugins will help as well.