If you’re having trouble with your MacBook Air, it’s easy to restart. A restart will completely reboot and reload the macOS operating system, clearing the system’s working memory for a fresh start. None of your data will be affected. Here are several ways to do it.
The easiest way to restart a Mac is by using the menu bar at the top of the screen. To do so, click the Apple logo in the upper-left corner of the screen. In the menu that appears, select “Restart.”
If you see any pop-up confirmation messages, click “Restart” again. Your Mac will close currently running apps, and the screen will momentarily go black. When you see the Apple logo on the screen, the startup process will begin. Log in as usual to continue using your Mac.
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Enter your password, then press Return. Your Mac will restart immediately.
If your MacBook Air has become unresponsive, you can force it to shut down by pressing and holding the power button for about 10 seconds.
On older MacBook Air models, the power button is located in the upper-right corner of the keyboard.
On newer MacBook Air models, the power button is the same as the Touch ID sensor, and it’s also located in the upper-right corner of the keyboard.
Press and hold the power or Touch ID button for 10 seconds. The screen will go black and the unit will turn off. To start it back up, press and hold the power button until you see the Apple logo on the screen. Good luck!