Error when booting Mac with FileVault Encryption Ever since I encrypted my MacBook Pro I am seeing this error right after I type in my password at the initial screen.

Any ideas what this means, how serious it is or maybe even how to fix it?



Larger size

Apologies for the smudginess and reflection in the pic - it's displayed for a fraction of a second and it's the best one I've managed to take.
What is really is might be a bit of a guessing game, but the next step is clear.

Boot to your Recovery HD and see what disk utility makes of the volume itself.

If you lack a Recovery HD - then it's time to make a back up of any files you can reach (attach the drive to a sled / boot in target mode / install the OS to an external drive and copy things off using another OS.)

At that point, you can re-run the installer which may fix the issue for you and will certainly get you back to having an Recovery HD or expose a hardware problem if you can't even re-instal the OS on top of the data that is there.