I agree with MATTI. Best bet is to install Windows via Boot Camp and run programs that way. I haven't yet been able to find a OS X native reptile record keeping application. Excel or Numbers are your only choice for running native apps as far as I know. Otherwise it's dual-booting or emulation software.
The only place I haven't looked yet is sourceforge. There are tons of open-source projects there for all operating systems. Might be able to put in a request or start a discussion and find some other interested parties over there. I'll check up on it.