Possible Duplicate:
How do I change the desktop name on the Unity panel?
How do i hide or change the wording on the top bar in Ubuntu 12.04?
I'd like to alter it from 'Ubuntu desktop' to 'Mac OS X' but i am unsure of how to do this. There was a thread explaining this a while ago but i didn't understand the process completely meaning i haven't been able to give it a go.
Hope you can help, UbuntuRob.