How to Burn Pictures to CDs and DVDs in iPhoto
Apple iPhoto makes it simple to burn CDs and DVDs. Just select the photos you want to copy (individual pix, albums, events, or your entire library). Choose Share→Burn and insert a disc into your CD or DVD burner. Depending on the size of your collection and whether you have a CD or DVD burner, you may be able to archive your entire collection onto a single disc.
If you burn pictures inside iPhoto, they can be easily viewed later only in iPhoto. To create a disc that you can view on a Windows machine or elsewhere, choose File→Export and then choose a file format such as JPG. Next, choose a location inside Finder. Quit iPhoto and open Finder. Make sure you have a CD or DVD in your burner and drag the folder with the photos you exported onto the disc icon. After the files have been copied, choose File→Burn Disk and then click Burn.