MacBook Air Energy Saver (Sleep) and Screen Saver Settings
Engergy Saver (Sleep) Settings
Go to the Apple menu > System Preference and click on “Energy Saver.”
There are two tabs at the top labeled “Battery” and “Power Adapter” each with their own settings. There are two time sliders: one for the monitor, and one for the entire computer that need to be set to your preferences.
The screen saver options have similar time sliders. Your system settings should have the computer go to sleep several minutes or hours after the screen saver starts.
Go to the Apple menu > System Preference and click on “Desktop & Screen Saver.” Select the Screen Saver tab. Use the “Start Screen Saver” time slider to tell your computer how long it should wait after your last activity before the screen saver starts.
Change these settings so they work for you, but keep in mind your system security and battery life.