DNG has not changed. No reason your older Mac shouldn't handle "new" DNG files. 
I'll send you one or more if you want to experiment.

stan

On Sep 8, 2013, at 4:40 PM, Aahz Maruch wrote:

> On Sun, Sep 08, 2013, Godfrey DiGiorgi wrote:
>> On Sep 8, 2013, at 12:20 PM, Brendan MacRae <bpmac...@gmail.com> wrote:
>>> 
>>> I'm just confused since I see that Apple updated its camera raw
>>> compatibility under Lion (update 4.04) for the K-5II. I like the fact
>>> that OSX handles DNG across the entire operating system (like hitting
>>> the spacebar to preview images, including DNG files). Is the DNG from
>>> the newer bodies still compatible with 10.6.8 this way? Has the DNG
>>> format changed in the new bodies? Since I've been using Aperture 2 for
>>> RAW processing (and can't upgrade) I'm hoping for backward
>>> compatibility.
>> 
>> Unfortunately, Aperture relies upon the OS X core frameworks for its
>> raw processing, and (IIRC) will not accept image files even in DNG
>> format for which the core frameworks have not been updated. To use the
>> new frameworks, you'll need the latest OS X and Aperture versions.
>> 
>> Of course, you could see if you can get a K5II DNG file from someone
>> and test it out, but I suspect that you'll have to do something
>> different from what you have been doing.
> 
> Happy to provide DNG on request, e-mail me privately.
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