This article describes an interaction issue between Apple’s FileVault 2 technology and Symantec PGP Desktop as of the Mac OS X 10.7.2 update. Prior versions of FileVault 2 in Mac OS X 10.7.1 and 10.7.0 do not exhibit this behavior.
2. Open Terminal. At the prompt type:
$ sudo chroot /Volumes/<name of the mounted disk>
For example "sudo chroot /Volumes/Macintosh\ HD". Because of the chroot command all of the following commands affect the mount volume and _NOT_ your host system. Do not skip this step!
3. Type the following:
# cd /System/Library/Extensions
# mv PGPwde.kext /Users/Shared/
# cd /System/Library/Caches/com.apple.bootstamps/ (<tab> (press the tab key, then enter)
You should now be in a directory named as follows:
# rm \:System\:Library\:Caches\:com.apple.kext.caches\:Startup\:kernelcache
# cd /System/Library/Caches/com.apple.kext.caches/Startup
# rm kernelcache