Apple today released Digital Camera RAW Compatibility Update 3.7 which adds RAW image compatibility for the following cameras to Aperture 3 and iPhoto ’11:
• Fujifilm FinePix X100
• Nikon D5100
• Olympus E-PL2
• Olympus XZ-1
• Samsung GX-1S
For more information on supported RAW formats, see http://support.apple.com/kb/HT3825
Digital Camera RAW Compatibility Update 3.7 is available via Software Update and also via standalone installer.
More info and download link (6.62 MB) here.