I wasn’t able to target 10.6 on mavericks Xcode 5 i think, so i decided to go for 10.7 as i have 10.7 and 10.9 installed and running and i can test on both of them, and the same build (current nightly) works on those two.
If you can setup the current ctrlr project to target 10.6 and confirm that it works on other higher os versions i’d be more then happy to include your changes.