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KB-2607: Unable to unlock System Preferences tab (padlock)

Authentication Service ,  

12 April,16 at 11:45 AM

Applies to: All versions of Centrify DirectControl on OS X 10.7 and 10.8


When using a smart card device to login to the machine, clicking the padlock in System Preferences does not produce any response (no prompt for password).

Restarting the machine sometimes fixes this, but is not a permanent solution.

How can this be fixed?


This is a bug in OS X. (Apple Bug ID 12491456)

On OS X 10.7, if this problem occurs, please try to enter the following Terminal commands as Local Admin:


  • sudo launchctl unload -w /System/Library/LaunchDaemons/
  • sudo launchctl load -w /System/Library/LaunchDaemons/

The first command takes approximately 20 seconds to complete. After the command completes, restart System Preferences and the padlock should be now unlockable.

On OS X 10.8, the following command could also be used as an alternative:


  • sudo pkill -HUP securityd


This issue has been fixed by Apple in OS X 10.8.5. Below is a quote from an Apple article:

"Addresses an issue that prevented a smart card from unlocking preference panes in System Preferences"

(Link provided as a courtesy)