I'll wait til I can get it to compile myself... This doesn't seem like the kind of thing I'd want to use some untrusted - no offense - third party's binaries for.
It's written in Python, so it's interpreted, not compiled. All of the source code is inside the .app, completely without obfuscation.
I have also written instructions on the wiki in order to run it yourself.
https://bitmessage.org/wiki/Compiling_instructions#OS_XI have simply posted this .app bundle for convenience.
I recommend compiling your own .app once you get everything working. This can be done by running ./osx.sh in the PyBitmessage directory.