Works with Photoshop. Features Nondestructive image processing plus it lets you import, edit, catalog, organize, retouch, publish and archive your images better than ever. Looks like it replaces the clunky Adobe Bridge that comes bundled with Photoshop CS and above.
I don't use Mac.. but this looks like it might be worth looking into. $499 to replace the FREE Adobe Bridge......
Link:
http://www.apple.com/aperture/