Apple released Digital Camera RAW Compatibility Update 5.02, a maintenance update that adds support for five new cameras from Nikon, Olympus, and Sony in Aperture 3 and iPhoto ’11.
- Nikon D5300
- Nikon Df
- Olympus OM-D E-M1
- Sony Alpha 7
- Sony Alpha 7R
RAW is the native file format for most DSLR cameras, and Apple adds support for new cameras after their release.
This update is 7.1MB as a standalone download at the link above. It's also available through the Mac App Store as a 6.8MB download.