Sony does not provide a software for updating the GPS Assist data for GPS-enabled cameras when you are using Mac OS X.
There is a free tool which provides the support for automatically updating the data. I have used it a while and it has work without any problems. To update the the GPS Assist data regularly makes the GPS work much, much faster.
Here is the link for the software:http://code.google.com/p/gpsassist-update/downloads/list