Yosemite System Preferences issue when enabling FileVault 2 with an institutional recovery key

In 10.10.0 and 10.10.1, I’ve noticed an issue when enabling FileVault 2 via System Preferences when using an institutional recovery key.

In Mavericks and earlier versions of OS X, the behavior of System Preferences looked like this:

1. Click the lock to unlock the FileVault preference pane
2. Click the Turn on FileVault… button
3. A list of users that can be enabled for FileVault 2 is displayed. The logged-in user account is marked with the green checkbox that shows that the account is enabled.
4. A message is displayed that a recovery key has been set by a company, school or institution.
5. A message prompting the user to restart is displayed.
6. Once the Restart button has been clicked, the FileVault 2 initialization process continues and restarts the Mac.
7. The Mac restarts to the FileVault 2 pre-boot login screen.

To illustrate, I’ve made a video showing the described behavior.

In Yosemite 10.10.0 and 10.10.1, the behavior of System Preferences looks like this:

1. Click the lock to unlock the FileVault preference pane
2. Click the Turn on FileVault… button
3. A message is displayed that a recovery key has been set by a company, school or institution.
4. System Preferences then displays no additional messages and will appear to hang for up to two minutes.
5. The Mac restarts without further input from the user.
6. The Mac restarts to the FileVault 2 pre-boot login screen.

To illustrate, I’ve made a video showing the described behavior.

As Yosemite’s current behavior is different and omits several steps that were present in previous versions of OS X, I believe this is a bug in Yosemite instead of intended behavior.

To help get it fixed, I’ve filed a bug report. For those interested in duping it, it’s bug ID 19124344.

For those interested in the details, I’ve also posted the bug report to Open Radar:

http://openradar.appspot.com/19124344