Mine seems to be working fine:

https://dl.dropboxusercontent.com/u/7405118/hypercoin-qt.zip

Again, I don't know if that was a system-specific issue causing your version not to work on my machine, but yours hangs up for me. If any other Mac users run into the same issue, mine seems to be working okay.

Also, Max, I've compiled a more recent version of the MinCoin client for Mac if you want to update your thread of Mac clients (this is version 0.6.4 reflecting the hard fork:  https://dl.dropboxusercontent.com/u/7405118/MinCoin-Qt_v064.zip).

I don't know how ryanb wants to handle a bounty - if you feel I'm deserving of any of it, here is my HYC address:
HKBtPSio6kud3Bg8AFBhKzthTUz7oKRGGq