Follow these steps to give your Mac a Computer Name.
- 

- From the Apple () menu, choose System Preferences. 

- Click the Sharing icon in the System Preferences window. 

- If a padlock icon appears in the lower left of the window, click to unlock it, then enter an administrator name and password. 

- Enter a name for your Mac in the Computer Name field. 

The Computer Name is used to advertise your Mac's sharing services on your network. You can update this name at any time.