LockDown Browser Will Not Launch Due to Blacklisted Applications


The Respondus LockDown Browser will not launch on my Mac and says the following: 

Some Blacklisted Application(s) are running

Chooses "Quit LockDown Browser" to quit or "Kill these applications" to automatically close these applications.


  • macOS 10.13.6+


Certain background applications must be closed before the Respondus LockDown Browser can run properly on a macOS computer. Some of these services, such as Siri, may not close properly and the software fails to launch even after selecting Kill these applications


Clicking Kill these applications should allow the LockDown browser to launch as needed. However, if this message will not clear the following steps can be used. Please note that these steps should only be used if selecting Kill these applications does not work first. 
  1. Click on the Apple in the upper-right corner. 
  2. Select System Preferences
  3. Click Siri
  4. Click Siri Suggestions & Privacy... 
  5. Uncheck any selected applications in the list. 
  6. Click Done
  7. Uncheck Enable Ask Siri
  8. Uncheck Show Siri in menu bar
  9. Click the array button to go back to the main system preferences. 
  10. Click Users & Groups
  11. Select the user that is currently using the computer and/or will need to use the LockDown Browser. 
  12. Click the Login items tab. 
  13. Highlight any items and select the minus button to remove them. 
  14. Close down any other open applications. 
  15. Restart the computer. 
  16. Once the computer boots, immediately start the LockDown Browser.
    Note: Do not start any other applications or do any searching with the Finder or Spotlight.
    Note: If the prompts still do not go away, follow these additional steps. 
  17. Go to Finder
  18. Open the Applications folder. 
  19. Open the Utilities folder. 
  20. Open Activity Monitor
  21. Click the View menu. 
  22. Select All Processes
  23. Locate and highlight Siri and/or siriknowledged
  24. Click the to stop the processes.
  25. Select Force Quit
  26. Close out of all open applications and launch the LockDown browser again.
    Note: You may have to click Kill these applications upon the program start-up.

If these steps do not resolve the issue, please contact the ITS Service Desk.

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Article ID: 3247
Thu 3/28/19 9:54 AM
Mon 11/8/21 1:13 PM