Filevault Stuck Optimizing When I enabled filevault on Yosemite 10.10.5, it went through the whole process of encrypting, and then it changed to "Optimizing." It progressed to 86% and seems to be stuck there.



For about 24 hours now, it's been saying "X hours remaining." It varies from like 1 hour to 12 hours. About 12 hours into it, I rebooted just to see if that would help, but it didn't. When I run diskutil cs list, it says:

CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
    =========================================================
    Name:         Macintosh HD
    Status:       Online
    Size:         999345127424 B (999.3 GB)
    Free Space:   5495873536 B (5.5 GB)
    |
    +-&lt; Physical Volume XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
    |   ----------------------------------------------------
    |   Index:    0
    |   Disk:     disk0s2
    |   Status:   Online
    |   Size:     999345127424 B (999.3 GB)
    |
    +-&gt; Logical Volume Family XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
        ----------------------------------------------------------
        Encryption Status:       Unlocked
        Encryption Type:         AES-XTS
        Conversion Status:       Converting
        Conversion Direction:    forward
        Has Encrypted Extents:   Yes
        Fully Secure:            No
        Passphrase Required:     Yes
        |
        +-&gt; Logical Volume XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
            ---------------------------------------------------
            Disk:                  disk2
            Status:                Online
            Size (Total):          993513701376 B (993.5 GB)
            Conversion Progress:   Optimizing 86%
            Revertible:            No
            LV Name:               Macintosh HD
            Volume Name:           Macintosh HD
            Content Hint:          Apple_HFS


What could the problem be? Is there anything I can do to fix it?
Well, how about that.

A few minutes after posting this question, it started making progress again. It zipped straight from 87% to 99% in a few minutes, and now it's done.

Apparently the answer is just "wait more hours."