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Caffeine is a portable free tool which can help to prevent your screensaver activating, or your PC going to sleep. Just launch the program and it simulates a keypress every 59 seconds, so your machine thinks you're still working at the keyboard, and won't shut down.
Caffeine adds an icon to the system tray where you can control how it works. Right-click and you're able to turn the program on for only an hour, for example. It will then keep your system awake for that time, convenient if you're not working at the keyboard but need it to remain active (you're giving a presentation, perhaps), before returning to normal.
Prevent your Mac from falling asleep, dimming your screen or starting the screensaver. Theine keeps macOS awake just like caffeine does with you. And we all do enjoy a good cup of coffee occasionally, don’t we? So does your Mac! Prevent your Mac from falling asleep, dimming your screen or starting the screensaver. Theine keeps macOS awake just like caffeine does with you. And we all do enjoy a good cup of coffee occasionally, don’t we? So does your Mac!
The program provides several command line switches to control how it works. There are options to choose which keypress is simulated, for instance, and how often it's repeated. You can choose whether it's active on launch, or how long it will be active. You get to decide whether Caffeine works from your system tray, or a taskbar button, and there's even an option to prevent sleep, but allow the screensaver to start.
Conveniently, all this comes packaged in a single tiny executable (a mere 40KB) which, the author claims, runs on anything from Windows XP upwards.
An effective way to gain a little extra control over your PC power settings.
Caffeine for Mac is a simple app designed to do one thing and one thing only. When active, Caffeine will prevent your computer from dimming the screen, enabling screensavers, or hibernating. This function is useful in a variety of situations, and Caffeine's simplicity makes it ideal for users that need to keep their computer as awake as they are.
A cup of coffee for your computer
This app keeps your Mac awake with one simple click.
After a simple install, Caffeine's icon is added to your menu bar. From there, clicking will activate the app. Caffeine will then keep your computer awake until you click the icon again to turn it off. It performs its task without frills, and is great for keeping your Mac active during long Netflix binges, study sessions, or presentations. For users that like more control, Caffeine's sub-menu allows you to set a time frame for Caffeine to stay active. This can range from as little as 5 minutes to indefinitely.
Though Caffeine is an excellent program, users should be aware that the app's background RAM usage may affect performance at times. If you don't take advantage of the app's customization options, you could also find the small icon on the toolbar forgettable, making it easy to leave the app running unintentionally. Caffeine also has no way of preventing your computer from sleeping when it's physically closed, so if you have to do so for whatever reason you'll need to reactivate the app when you open your computer again.
Where can you run this program?
You can run Caffeine on any computer working with Mac OS X 10.5.
Is there a better alternative?
While it shines because of its simplicity, there are a few Caffeine alternatives that allow for a more in-depth experience. Amphetamine has a more detailed user interface and more features. KeepingYouAwake also functions the same, but also has the added benefit of being Open Source.
Caffeine is a bare-bones program that works exactly as designed, and is perfect for keeping your computer awake.
Should you download it?
Caffeine is worth downloading whether you're a professional using your Mac for long workdays and presentations, or a more casual user streaming movies and having marathon gaming sessions.
Caffeine Software App