You can find your computer's name on a Windows PC by opening the "About" menu. On a Mac, you'll find your computer's name in the System Preferences app, under "Sharing." Your computer's personal name ...

To change a Mac's name, edit the "Computer Name" field in the "Sharing" pane in System Preferences. Changing your Mac's computer name will also change its host name. You can change the host name ...

I need to take a running windows desktop box that's part of a domain, give it a new computer name, and then continue working on it (with the box having the new name), without having to reboot at all.