Setup Assistant

Setup Assistant is an application that runs immediately following a successful new installation of macOS.

Description
The Setup Assistant appears automatically after a new installation of macOS or when a newly-purchased Mac is turned on, making it easier to set it up. The assistant asks questions about the user, the computer's location, and desired settings. Then it automatically configures the Mac, based on the user's input.

In installations of macOS or Mac OS X, Setup Assistant can be found in:  

Upon startup, Setup Assistant will can for the existence of an empty file named   in the hidden directory   and will run if it cannot be found. Deleting this file through the Terminal app will cause Setup Assistant to automatically run upon the next startup.