I’ve become somewhat obsessed with the faces feature in iPhoto. Currently, I have about 7000 unidentified faces in my library. I knock out a few hundred here and there. It’s oddly satisfying, but I go to a lot of large events – events where a lot of people look familiar because they are regulars, but I don’t know them. This makes finding faces rather cumbersome, especially since the method of ignoring faces requires the mouse. Everything else can be done with the keyboard. Plus, doesn’t track repeatedly ignored faces, so the same faces keep showing up. Well, I’ve discovered a way to work around these cumbersome limitations.
Doing everything with the keyboard makes things go a lot faster. If you’re using the Find Faces feature and skip faces you don’t know (because you don’t want to pause to use the mouse), the next time you click on Find Faces, you’ll be presented with those same unknown faces over and over again. They build up and always get presented in the same order, s …
Source: Mac OSX Hints