If you are running any PGP Desktop versions prior to 10.1.2, you must upgrade PGP Desktop prior to upgrading to Mac OS X 10.6.8.
If you are currently running a version of PGP Desktop 10.1.x or older and upgrade to Mac OS X 10.6.8, you will experience a booting failure due to the Mac OS X 10.6.8 update modification of the boot.efi file.
Please see the chart below for supported versions and build numbers of PGP Desktop for Mac OS X 10.6.8:
Service Pack 1
Service Pack 2
Service Pack 3
A complete list of known issues for PGP Desktop 10.x and the release in which they have been resolved is available here: