There aren’t, and supporting them isn’t something that we plan to do. If there are others in the community would would like to work on creating those binaries for the few users who need them, we can discuss getting them vetted and distributed, but we’re (the Peerunity development volunteers) stretched too thin as it is already and cannot dedicate resources to do it.
OSX 10.6 is not maintained by Apple anymore. This operating system is highly insecure. It would be suicide to run a single wallet on it, so it’s a very good thing that Peerunity doesn’t support this OS (preventing users from doing something stupid ).
Apple (AAPL) has stopped issuing updates for Mac OS X 10.6, known as Snow Leopard. That means the company won't be sending out software fixes to protect you from hackers and computer viruses.
The only alternative I can think of is if someone wants to build their own version of Peerunity on their 10.6.x machine. You could try to see if the instructions from Peercoin core 0.3 work on 10.6.x for Peerunity: