Apple’s latest Digital Camera Raw Compatibility Update extends Aperture 3 and iPhoto ’11 support to six more cameras and fixes processing issues for four others. Newly supported cameras include the Canon EOS Rebel T3/1100D/Kiss X50, Canon EOS Rebel T3i/600D/Kiss X5, Olympus E-5, Panasonic Lumix DMC-FZ100, Pentax K-r, and Pentax K-5. The update also improves the processing of images from the Nikon D7000, Nikon Coolpix P7000, Panasonic Lumix DMC-GF1, and Panasonic Lumix DMC-GH2. The update is available via Software Update and the Apple Support Downloads page. Apple also publishes a full list of supported cameras. (Free, 6.45 MB)
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Use Shift to Compare Edits in iPhoto '08
In iPhoto '08, while you're editing a photo, press the Shift key to see a "before" view; let it up to see the "after" view. It's much faster and easier than using Undo and Redo.