How do I revert Mac locations?
Your computer name can be changed in System Preferences &gt; Sharing. This name may take a while to propagate to Apple ID device list.
Your hard drive name (not your computer name) looks set to Macintosh HD–this can be changed by simply right clicking and choosing rename.
Your account name can be identified in System Preferences &gt; Users &amp; Groups. If the information on this screen is incorrect, the easiest solution is to make a new account and transfer stuff manually. It is possible to change this without making a new account, just not trivial.