Originally Posted by Freakscene
Keith, do you have a time machine backup of your system with the old OS? I'd downgrade back until you can get it sorted. Part of the inherent difficulty in buying third party software, unfortunately.
ACDSee on the mac (with the previous OS) has always refused to render the raw files from my Leica 240. Try and open a DNG from the leica in ACDSee and 'bang' the program crashes and just shuts down. In the windows version as on my Toshiba laptop no problems. I've been on ACDSee's case about the Leica files for as long as I've had the camera and although they acknowledge the problem they have yet to do anything about it so I'm not optimistic about the latest issue. They really don't seem to care too much about their apple version of the software.
The only reason I like ACDSee is because it has a file tree and you don't have to import or export images to work on them.