To shut down your MacBook Air completely, follow these simple steps:
- Click the Apple menu in the top-left corner of your screen.
- Select "Shut Down" from the dropdown menu.
- Optional: Deselect "Reopen windows when logging back in" if you don't want your open applications to automatically reopen when you turn your MacBook Air back on.
Once you've completed these steps, your MacBook Air will begin the shutdown process. The screen will go black when the shutdown is complete, indicating that it's fully powered off.
According to the Apple support documentation, "On your Mac, choose Apple menu Shut Down. If you don't want app windows that are open to reopen when your Mac restarts, deselect “Reopen windows when logging back in.” A Mac is completely shut down when the screen is black."
In summary, shutting down your MacBook Air is a straightforward process through the Apple menu.