Hello. Today I submitted the following information to Adobe and Apple about what I've encountered. Here is what I submitted, and it details that it is not isolated to only Photoshop, but to all my CS6 programs:
"I have been following two online threads for about a year, and it appears this issue between Apple and Adobe hasn't been resolved yet. One of the threads is under an Adobe Photoshop forum. http://forums.adobe.com/thread/1008694?start=0&tstart=0
The other is under Apple Support Communities. https://discussions.apple.com/thread/3972615?start=0&tstart=0
Since I purchased my Mac Pro with Lion 10.7.4 using CS6, none of my Adobe files (whether created in CS6 or older files from previous versions) open directly into their originating program when I double-click on them. I have to open all of them through the program. If I double-click on them, all of them open into Preview, whether they are Photoshop, Illustrator, InDesign, or Acrobat files.
Some of the Adobe files created in older versions and then copied on to my new system have their file icons. And, some of the new Adobe files created in CS6 have their file icons. However, even these Adobe files with an icon do not open directly into their originating program. They, too, open into Preview.
To be clear, ALL of my Quark files show their file icon and open and save correctly. Microsoft files show their file icon and open and save correctly. This appears to be isolated to ONLY Adobe files that I am now trying to open into their CS6 versions.
I have been working on Apple systems with Mac programs as a professional designer since 1989. I have never encountered such a buggy upgrade. Based on my nearly 24 years of experience, it seems pretty obvious to me that this is a CS6 problem since I don’t have this issue with any other program than CS6.
Please let me know if this issue has been corrected with a recent upgrade, either to the Apple OS or to Adobe CS. Thank you."