I maintain the Mac OSX builds of PMS and on my system I run Mac OS X 10.8 (Mountain Lion) with XCode 4.5, which means that I cannot build for anything older than Mac OS X 10.7 (Lion). So, alas, there will be no official releases for your version.
However, if you feel up to it, you can build PMS and the binaries that come with it yourself.
The source code lives on GitHub
, scroll down to read the build instructions.
And in the contrib
directory you will find scripts to build the binaries. Be sure to change the OSX_VERSION in build_pms_binaries.sh
before running it.