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CrashPlan app 3.6.3 unable to connect to backup engine on Mac

Applies to:
  • CrashPlan for Small Business (Mac only)
  • CrashPlan PROe


There is a known issue in the 3.6.3 version of the CrashPlan app that impacts systems running Mac OS X with case-sensitive file systems. Upon opening the CrashPlan app, the app reports that it is Unable to connect to backup engine.


Mac OS X with case-sensitive files systems running version 3.6.3 of the CrashPlan app

Recommended solution

To resolve the issue, update the CrashPlan property list file to replace the lowercase "s" in MacOs with a capital "S" using the following steps:

  1. Open Terminal
  2. Stop the CrashPlan service by entering this command:
    sudo launchctl unload /Library/LaunchDaemons/com.crashplan.engine.plist
  3. Open the CrashPlan plist file by entering this command:
    sudo nano /Library/LaunchDaemons/com.crashplan.engine.plist
  4. Enter your password for the computer when prompted
  5. Locate the following string:
  6. Update it to:
  7. Press Control+X to exit
  8. Press Y to confirm the changes
  9. When you see the prompt File Name to Write, press Enter to save to the existing location
  10. Start the CrashPlan service by typing:
    sudo launchctl load /Library/LaunchDaemons/com.crashplan.engine.plist