In OS X 10.11, Apple fundamentally changed the way that programs and applications are allowed to run in the operating system. The allowable permission sets that are now in place have caused conflicts with our product, and for the type of permissions that are required, in particular for drive encryption, there may not be a solution for Symantec Encryption Desktop. Engineering has been working on addressing the other components, and the release of Symantec Encryption Desktop 10.3.2 mp12 should work for the non-drive-encryption components. It should release this month.
Symantec Endpoint Encryption 11.1.0 has FileVault management capability, and Engineering is looking at the possibility porting this functionality to Symantec Encryption Desktop, but there is no official timeline for that functionality.