If you leave your Mac asleep on your desk overnight, you might occasionally hear its hard drive spin up, its fans turn on, or see its screen briefly illuminate. This occurs because of a feature called “Wake for Network Access.” By default, macOS periodically wakes the system from a deep sleep to silently check for network administrative updates, refresh shared printers, or handle incoming Apple TV requests.
While this is useful in a corporate office environment where IT departments push updates overnight, it is a complete waste of electricity for a personal home computer. If your Mac is located in your bedroom, the sudden fan noise and screen glow can even wake you up. You can disable this feature to ensure your Mac stays asleep until you physically touch it.
How to Stop Your Mac from Waking Up Automatically
You can disable the network wake triggers directly from the Energy Saver or Displays menu, depending on your Mac model.
- Click the Apple Logo in the top-left corner of your Mac’s screen.
- Select System Settings (or System Preferences on older macOS versions).
- If you are using a desktop Mac (like an iMac or Mac Mini), click on Energy Saver in the left-hand sidebar. If you are using a MacBook, click on Battery, then click the Options… button at the bottom.
- Look for a toggle switch labelled Wake for network access.
- Click the toggle switch to turn it completely Off.
- (Note: On some newer macOS versions, this setting might be phrased as “Wake for Wi-Fi network access”).
With this setting disabled, your Mac will enter a true, uninterrupted sleep state. It will ignore incoming network pings and background update requests, remaining completely silent and dormant until you tap a key on the keyboard or click the mouse.