Upgrading from Lion to Mountain Lion.
In the event that the Mac Operating System must be upgraded to a new major version, such as Mac OS X 10.7 (Lion) to Mac 10.8 (Mountain Lion), it is necessary to first uninstall PGP software from the system. If the system has been encrypted with PGP Whole Disk Encryption, the system must first be fully decrypted before attempting any further steps.
This article outlines the basic steps that should be performed:
1. Backup keys and keyring. Basic Details on how to do this are here:
Be sure to backup any other information that is needed.
2. Decrypt the machine completely using the PGP Whole Disk Encryption product. Open PGP Desktop, click on the PGP Disk and select the disk to decrypt and click the Decrypt button. Enter the current passphrase in order to start decrypting. Ensure the decryption process completes successfully and ensure AC power is supplied to the machine (not battery power).
3. Uninstall any previous versions of PGP Desktop before upgrading to the new version of Mac OS X.
Details on how to do this are here:
4. Upgrade the new version Mac OS X as recommended by Apple.
5. Mount the PGP Desktop disk image.
6. Double-click PGP.pkg.
7. Follow the on-screen instructions.
8. When prompted to do so, restart your system.
9. Re-encrypt the disk with PGP Whole Disk encryption.
Please note: For information on the supported versions of PGP and Mac OS X Operating Systems, please see the following article: