Apple released the OS X Lion v10.7.4 Update so make sure to get the new version as it brings RAW compatibility for some additional cameras - below is the list of those that are supported since the 10.7.3 version.
Cameras supported in version 10.7.4 and via compatibility updates 3.10, 3.11, 3.12):
- Canon EOS 5D Mark III
- Nikon D800
- Canon PowerShot G1 X
- Nikon D4
- Panasonic LUMIX DMC-GX1
- Panasonic LUMIX DMC-FZ35
- Panasonic LUMIX DMC-FZ38
- Samsung NX200
- Sony Alpha NEX-7
- Sony NEX-VG20
Here is the full list of fixes featured by the OS X Lion v10.7.4 Update and what they do (via Apple):
- Resolve an issue in which the "Reopen windows when logging back in" setting is always enabled.
- Improve compatibility with certain British third-party USB keyboards.
- Addresses permission issues that may be caused if you use the Get Info inspector function "Apply to enclosed items…" on your home directory. For more information, see this article.
- Improve Internet sharing of PPPoE connections.
- Improve using a proxy auto-configuration (PAC) file.
- Address an issue that may prevent files from being saved to an SMB server.
- Improve printing to an SMB print queue.
- Improve performance when connecting to a WebDAV server.
- Enable automatic login for NIS accounts.
- Include RAW image compatibility for additional digital cameras.
- Improve the reliability of binding and logging into Active Directory accounts.
- The OS X Lion v10.7.4 Update includes Safari 5.1.6, which contains stability improvements.
The update installer can be downloaded manually and you can get it here (useful option when you need to update multiple computers but only want to download the update once).