Try this: Mac OS X Change the Terminal Window Title
The title of the Mac OS X terminal window can easily be changed.
Changing the title can be useful when running a script or when using
multiple terminal windows for different purposes in order to identify
them easily when switching between applications and windows.
In the terminal window, from a bash prompt (the default shell) or in a
bash shell script, use the following command to change the terminal
window title to Tech-Recipes rules:
echo -n -e "\033]0;Tech-Recipes rules\007"
You can place (just about) any text in place of “Tech-Recipes rules”
including the contents of a variable. Consider the following example:
name=`hostname` echo -n -e "\033]0;$name\007"
This will change the title of the terminal to the hostname of the
computer running the shell.