Caffeine
Utilities
Caffeine keeps your Mac from automatically sleeping, dimming its screen, or starting a screen saver. Click its menu bar icon to turn this behavior on or off.
Caffeine is a menu bar utility that prevents your Mac from automatically going to sleep, dimming the screen, or starting a screen saver while it is active.
Click the menu bar icon to enable it, then click again to restore normal behavior. Right-click or Command-click the icon to open its menu.
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