The Adobe updater application (used to search for and install updates for many Adobe products) does not always work properly when run from a FileVault-protected account. Some updates install, but others simply quit with an error every time (Camera raw updates are especially bad). There are two fairly simple workarounds:
- Try to locate the update on the Adobe website, download it, and run the installer manually. The update should install fine this way.
- Log in from a non-FileVault account and run the Adobe updater application. The update should install fine and be usable for all accounts.
Admittedly, most people could have easily discerned the workarounds, but it took me many months to realise that FileVault was the culprit, so this might help someone else who is wondering why Adobe updates won't install.