Hier een mogelijke oplossing:
In order to disable the WD Drive Manager on Mac OSX 10.9, please follow the instructions below:
Click on Go on the top Menu bar.
Click on Utilities.
Open Terminal.
On Terminal, issue the following commands in the same order they are displayed:
sudo launchctl unload /Library/LaunchDaemons/com.wdc.WDDMservice.plist
sudo rm -R /Library/LaunchDaemons/com.wdc.drivemanagerservice.plist
sudo rm -R /var/tmp/com.WD.WDDriveManagerService
Let wel, heb hier geen ervaring mee. Werd door WD Support voorgesteld.