This may also appear on an
Apple_Boot slice (partition) that is not updated according to the list of users who are enabled for FileVault 2.
Visualising changes to an Apple_Boot slice
This first screenshot, from Mountain Lion, shows changes to the file system after using the Startup Disk pane of System Preferences – without a change of preference.
- changes were whilst booted from a startup volume named OS
- changes were to the file system on a separate volume named Boot OS X – on the
The two shots below are more relevant. Additional changes to the file system after using the Security & Privacy pane, to enable unlocking by an existing user who was previously without that ability:
There, most changes were probably made by
corestoragehelperd and/or a related process.
SuperDuper! backups to an encrypted logical volume (LV), and booting
I guess that SuperDuper! does not write – to a non-encrypted area – what's required for EfiLoginUI to present a recognisable list of named users.
Time Machine backups to an encrypted LV, and booting
When EfiLoginUI prompts for a passphrase:
- the encrypted LV is not yet unlocked.
Without that LV, I don't know which area of a disk is used for EfiLoginUI to present its dialogue, but generally …
Defocusing from SuperDuper! and from Time Machine
This answer may help readers to understand what occurs when updates are made to the parts of a file system that will be used by EfiLoginUI.
In some cases, interaction with the [Update Needed] interface may present a password hint:
The user Graphics resources appears to be invalid
A photograph of Lion: