show package contents

Click Show Package Contents to Access Your Photos in iPhoto

If you recently bought a new Macbook to replace a much older Mac, you may have trouble restoring old backups of photos and video stored in iPhoto from the elder machine. Pictures in iPhoto are stored in a blob called the "library". You have to right-click on the icon (which is secretly a folder) and select Show Package Contents, then you can find the original photo files (possibly sorted by year) that can be copied to your backup location.