We are fully compatible with Mac OS X 10.8.2 with Symantec Encryption Desktop 10.3.0 which you are able to download from http://fileconnect.symantec.com if you have a valid maintenance agreement in place with Symantec. If not, you can always download a trialware version of the software which will expire after 60 or 90 days (sorry can't remember which) here:
https://www4.symantec.com/Vrt/offer?a_id=109355
For a list of Mac OS X supported releases with Symantec Encryption Desktop (Formerly PGP Desktop) please go here:
http://www.symantec.com/docs/TECH174563
For a list of known issues/per release and a matrix of supported releases included go here:
http://www.symantec.com/docs/TECH198383