01-21-2011, 03:28 AM
Looks like you'll need at least 10.5.3, and possibly a newer iPhoto.
iPhoto 6: Supported RAW format cameras: http://support.apple.com/kb/TA24044
Mac OS X v10.5: Digital camera RAW formats supported: http://support.apple.com/kb/ht1475
iPhoto 6: Supported RAW format cameras: http://support.apple.com/kb/TA24044
Mac OS X v10.5: Digital camera RAW formats supported: http://support.apple.com/kb/ht1475