Where do dependent dylibs go in os x - dllnotfoundexception

I have read much commentary about solving the 'chained dlls' problem by placing the dependent dll in the editor folder. But there is no editor folder on a mac - and I have not seen any commentary on this problem on the mac. So where should the dependent libraries go? I assume somewhere in the application bundle - but exactly where would be nice to know!

Thanks for any help ...

Using Unity Pro 4.2.0f4 (on 30 day trial), with mountain lion, 10.8.4