Not all services/applications can be disabled through Preferences in your Mac. These startup items is defined in scripts. You can find them in StartupItems folder:
You should see some folders which contains the startup script. To disable to specific service, perform these steps in the Terminal and replace <appfolder> with the name of the folder/service:
- cd /Library/StartupItems/<appfolder>
- sudo touch .disabled
This will create an empty file named “disabled”. To confirm this, open up System Profiler and go to Startup Items and notice that the service is disabled.