Caffeine
Caffeine is a lightweight macOS menu bar utility that keeps your Mac awake during downloads, presentations, and other long-running tasks.
What is Caffeine?
Caffeine is a macOS utility that helps users keep their Mac from automatically going to sleep. It places a small menu bar icon on the desktop so you can quickly turn sleep prevention on or off without opening a larger app window. Common uses include keeping a Mac awake during file transfers, presentations, streaming, remote sessions, and other long-running tasks that should not be interrupted by sleep or screen dimming. The app also offers timed activation, so you can keep the Mac awake for a set period instead of indefinitely. Caffeine is designed for people who want a simple native helper rather than a full system management tool. It is published by Dominic Rodemer and fits naturally into everyday macOS workflows.
Key features
- Prevent your Mac from sleeping with a single menu bar click.
- Keep the display from dimming or the screen saver from starting while active.
- Set a timer to keep your Mac awake for a limited period.
- Choose whether the app starts automatically when you log in.
- Set a default duration for temporary wake sessions.
- Access controls quickly from the menu bar without opening a full window.
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Safety overview
Status: Safe
Caffeine is a straightforward utility whose background activity is normal for its purpose: it stays available in the menu bar and temporarily changes sleep behavior when you turn it on. It does not need unusual system privileges just to keep a Mac awake. If you use it on a laptop, remember that preventing sleep can increase battery use and keep the display active longer than usual. Remove it if you no longer want that behavior.
Recommendation: Keep Caffeine if you regularly need to stop your Mac from sleeping during work, media playback, downloads, or presentations. If you rarely use that function, you can remove it without affecting macOS beyond losing its quick menu bar wake controls.
Common paths
/Applications/Caffeine.app
Cache paths
~/Library/Caches/net.domzilla.caffeine
Preference paths
~/Library/Preferences/net.domzilla.caffeine.plist
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