Apple has released its latest Digital Camera Raw Compatibility Update [1], which extends Aperture 3 and iPhoto '09 support for a handful of cameras. Newly supported cameras and file formats include the Canon EOS Rebel T2i (550D/Kiss X4), the Leica S2, the Olympus E-450, the Olympus E-600, the Olympus E-620, the Sony Alpha DSLR-A230, the Sony Alpha DSLR-A330, the Sony Alpha DSLR-A380, and the Sony Alpha DSLR-A450. This version also addresses unspecified issues with raw image processing for the Canon EOS 30D, the Pentax K-x, and the Pentax K-7. The update is available via Software Update and the Apple Support Downloads page. (Free, 5.28 MB)
[1]: http://support.apple.com/kb/DL1035