MacBook Air 2025 keeps turning on after shutdown

A Mac laptop with Apple silicon automatically turns on and starts up when you open its lid or connect it to power.

You can change this behaviour without affecting your ability to turn on your Mac using its keyboard or trackpad.

1. Open Terminal, which is in the Utilities folder of your Applications folder. Or use Spotlight to find and open it.
2. Type one of these commands in Terminal, then press Return:
3. To prevent startup when opening the lid or connecting to power: sudo nvram BootPreference=%00
4. To prevent startup only when opening the lid: sudo nvram BootPreference=%01
5. To prevent startup only when connecting to power: sudo nvram BootPreference=%02
6. Type your administrator password when prompted (Terminal doesn’t show the password as it's typed), then press Return.

To undo any of the previous commands and reenable automatic startup when opening the lid or connecting to power, enter  sudo nvram -d BootPreference in Terminal.

If you hit the keyboard, or open the lid, it would turn on, that is normal behavior for Apple silicon Macs

Also, update to the latest version to make sure that there is no random glitch going on

Please describe in more detail exactly what IS happening.

Also, the current version of macOS Tahoe is 26.6.1. You might apply the update and see if the situation resolves.

You're welcome.

I wonder if maybe there had been some hang up with the automatic installation of the update (?).

Well, anyway, glad to know you got it sorted out.