Originally posted by Kennuck I'm new to Pentax and now have a K5. I would like to shoot in Pentax RAW but when I attempt to open PEF RAW files in either Silkypix Developer Studio or Pentax Camera Utility 4. the file will not open, greyed out and not even recognized. Is it because I have the Mac versions do you think? Hope one of you RAW shooters can help me out. Cheers - Ken
Straight out of the box, you should be able to view and edit (simple post-processing only) RAW files using iPhoto. You can also use Aperture (which is what I primarily use because editing is non-destructible) which is very reasonably priced via the App store. There are also lots of third party alternatives at varying prices, you can get a sampling by going to a site such as macupdate and doing a search for "RAW".
I don't use the software that came with my K-7, so I don't have any immediate suggestions on getting them tow ork with RAW files. However, perhaps you can verify that the files are not corrupted by opening them using iPhoto. This will rule out the (unlikely) possibility that there was a file transfer problem.