Ask HN: OSX App Developer

I have an idea for an OSX app and I want to get started ASAP. Unfortunately, I don't have the skills needed to get an app to market in the time frame i'd like. The initial offering is basic enough that I would be able to wrap my head around the code shortly enough to continue developing other features.

My questions:

Where/How do I find OSX app developers? What should I expect to pay (hourly) for osx app development? Is an NDA a good idea? Necessary? Any extra info on that?