Your MacBook Air should now reboot.
When the dialog box appears, press Enter again to confirm. Summary of Power Shortcuts how to reboot macbook air with keyboard
These keyboard combos reboot your Mac into special diagnostic modes. Your MacBook Air should now reboot
If your trackpad is broken but the keyboard works, use these steps to perform a safe restart: how to reboot macbook air with keyboard
Warning: This is a "hard" reboot and may result in the loss of unsaved work.