It's been a while since I posted but rest assured I've been busy. Truth is that whilst the photoshop integration was fairly simple in Windows, it's been somewhat problematic on the Mac. Partly due to my unfamiliarity with the Mac environment, and partly due to rather scant documentation by Adobe on their SDK.
The long and the short is that I'm now a little way behind where I had planned to be at this time. I was supposed to be finalizing the testing and completing the build, however I still have yet to start the testing in anger. The core functionality is all there now, except for the population of the names in the bridge menus. This should be completed this weekend and testing will start next week. Provided that no issues are found it should take around two or three weeks until ACR Preset Manager for the Mac is released.
Apologies all round - but it's important that the application hits the street as a top quality release.