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:
- /Library/StartupItems
- /System/Library/StartupItems
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.
Kenkyuu 