Find You over internet browsing, searching for working DC client.
For now i'm using EiskaltDC++, but not satisfied.
I own a few Macs MBPpro 2008, MBPro 2011, imac 2010(which i use as a server and main DC client), MBAir 2008, MacBook Black 2007, MBAir 2011. Also have acess to newest models on my work.
So, i can help testing on different hardware and versions of MacOS, examine stability.
And of course I can help You to test (or create, if You don't have) a ru localization.
I believe You can create Best-in-a-World DC client and i can help You in it by giving very usefull feedback.
Invite me, and i'll begin to work immediately.