Guide · 5 min read
Keep your Mac awake during a presentation or screen share
Few things derail a demo like the screen locking or dimming while you are mid-sentence. Here is why it happens on Mac and how to prevent it.
Short answer
- macOS display sleep and screen lock are based on keyboard, mouse, and trackpad input, so a presentation where you are mostly talking and not touching the trackpad can still trigger it.
- Mouse Jiggler prevents this by generating small, configurable cursor movement so macOS keeps registering activity.
- This is meant for sessions where you are actively presenting or supporting, not for leaving a machine unattended.
- Check your organization's screen-lock and security policy before relying on this on a managed device.
Why Macs lock mid-presentation
macOS tracks the same kind of idle timer as Windows: time since the last keyboard, mouse, or trackpad input. During a presentation, you may be talking for several minutes without touching the trackpad, which is enough to trigger display sleep or the screen lock.
Built-in settings vs a keep-awake tool
You can raise the "Turn display off" timeout in System Settings > Lock Screen, but that is a global change you then have to remember to lower again afterward. A session-based tool avoids that tradeoff by only running for the length of the presentation.
Using Mouse Jiggler for a demo
Start Mouse Jiggler a minute before the presentation or screen share begins, and stop it once you are done. The small cursor movements keep the display and session active without you needing to touch anything.
Managed device considerations
If the Mac is managed by your employer, client, or school, confirm that keep-awake utilities are permitted before relying on one for an important demo or client call.
FAQ
Why does my Mac lock during a Zoom screen share?
Zoom does not prevent macOS sleep or lock timers on its own. If you are not touching the trackpad or keyboard, the normal idle timer still applies.
Can I just disable the screen saver instead?
You can, but it is a persistent system-wide change. A session-based keep-awake utility only affects the current presentation.
Is it safe to use during client demos?
Yes, as long as you are actively presenting or supporting the session and it complies with any device policy that applies to the Mac you are using.