SafeGuard Disk Encryption for Mac: Required steps when upgrading from OS X 10.6 (Snow Leopard) to 10.7 (Lion)
Known to apply to the following Sophos product(s) and version(s)
Sophos SafeGuard Disk Encryption for Mac 5.55.0
All supported operating systems.
What To Do
As Sophos SafeGuard Disk Encryption for Mac 5.55 is the first version for Mac OS X 10.7 (Lion), an update from previous versions is not possible.
To upgrade from Mac OS X 10.6 (Snow Leopard) to 10.7 (Lion), you need to uninstall Sophos SafeGuard Disk Encryption for Mac 5.50.x first. This step includes a final decryption of the encrypted partitions.
After the successful update to Lion, you need to install Sophos SafeGuard Disk Encryption 5.55.x and encrypt the partitions again.
It is not necessary to change your exclude rules for your time machine configuration for this.