MacMost: Making the most of your Mac, iPhone, iPad, iPod, and Apple TV.

In iPhoto 09 you can select Faces, and then one of the faces you have already identified. You can then press Confirm Name to confirm that face in other photos. The trick is to do this over and over again, repeating until iPhoto runs out of pictures to confirm. Each time you do it, iPhoto will get smarter about identifying that face, which is why it will find new photos for you to confirm.

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