Available article translations:

Parallels Desktop cannot be started. Problem ID 15431

  • Parallels Desktop 10 for Mac Home Edition
  • Parallels Desktop 9 for Mac Standard Edition
  • Parallels Desktop 8 for Mac Standard Edition


Cannot start Parallels Desktop. It fails with Problem ID 15431 error.


Certificate preferences have been changed.


  1. Launch Keychain Access application.
  2. Open Keychain Access Preferences.
  3. Go to Certificates tab.
  4. Set Online Certificate Status Protocol (OCSP) to Best attempt.
  5. Set Certificate Revocation List to "Best attempt".
  6. Close the Preferences screen.
  7. Launch Parallels Desktop.

If the issue still persists,

Open Terminal (Finder -> Applications -> Utilities -> Terminal) and execute:

    ls -l "/Library/LaunchDaemons/com.parallels.desktop.launchdaemon.plist"  

If it returns anything (com.parallels.desktop.launchdaemon.plist is found), remove it, executing:

   sudo rm -f "/Library/LaunchDaemons/com.parallels.desktop.launchdaemon.plist" 

Enter the password from your Mac user account and hit Return/Enter again.

If it does not help,

  1. Uninstall Parallels Desktop;
  2. Run "Repair Disk Permissons" on your Mac:
    • Open Disk Utility (/Applications/Utilities/);
    • Select your Mac OS X startup volume (Macintosh HD by default) in the column on the left of the Disk Utility window;
    • Click the First Aid tab;
    • Click the Repair Disk Permissions button;
  3. Restart your Mac;
  4. Download the installation file for the last release of Parallels Desktop version you are running at the following link:

1e5db16426987d561060acdf56d947b4 97cd84747b25a2e5a06065a21a747a53 a9c6e0b6a5209e617a7c0dd5eace86cf 39e36b0abb33520c52ec8a15b563c41d 3307fff3682b15f0ba3fbe13d779296d

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