<p>Arthur, maybe Aperture could be a possibility for you? As for an older version to use with 10.6.8, I had a similar issue once. I found that if you contact Apple directly, they can give you a "key" to the metaphorical backroom of the App Store, where they keep older versions of their software. I discovered this option quite by chance. The other issue, of course, is the A7 RAW format is new enough that it will likely not be supported in an older version of the software. In that case, I have been in the habit of converting my RAW files to DNG using the free Adobe DNG converter software. Not the best solution, but is at least a work around for the time being. Best of luck, Paul.</p>