The LDS Tech website answers the question regarding a new version of PAF or Mac OS support.

http://beta.tech.lds.org/index.php?option=com_content&task=view&id=118&Itemid=83

While you're on the site take a look around the family history section of the forums and read the discussion about PAF and things related to new FamilySearch.

Thanks to James W Anderson on FHCNET for bringing this article to my attention.