Drag your photo library to external hard drive for backup.
For small iPhoto libraries, you can backup to CD / DVD. Load CDs or DVDs into your Mac optical drive, drag your iPhoto library from the Pictures folder into the optical disc icon on the desktop. Then, drag this icon towards the trash to activate the Burn Disc burning application.
Drag the disc icon towards the trash to write.
If your iPhoto library is too large for the size of a DVD, you can record it in sections. From the iPhoto application, mark the photos you want to copy, then select Share -> Burn from the menu bar. This is a great way to create a backup disc.
iPhoto allows you to burn images to disc.
To export presentation files, use Finder to locate the Pictures folder and drag them to the DVD folder.
If you want to create an image disc for viewing on your computer, you must first export the images to a folder on the desktop using the File -> Export command, and then drag the folder to the DVD.