Welcome to Amphetamine, the most awesome keep-awake app ever created for macOS. Amphetamine can keep your Mac, and optionally its display(s), awake through a super simple on/off switch, or automatically through easy-to-configure Triggers. Amphetamine is extremely powerful and includes advanced features for those who need them, yet remains intuitive and easy-to-use for those who don't need all of the bells and whistles.

=== Click to Keep Your Mac Awake ===

Quickly start a keep-awake session from Amphetamine's menu to keep your Mac awake.

• Indefinitely, for a specified amount of time, or until a specified time
• While a file is downloading
• While a specific app is running

During a keep-awake session, choose to allow or prevent:

• Display sleep
• Screen saver activation
• System sleep when built-in display is closed
• Automated mouse cursor movement
• Locking of the screen

=== Advanced Automation ===

Create a Trigger to automatically keep your Mac awake.

• While an external display is connected
• While your Mac's display is being mirrored
• While a USB or Bluetooth device is connected
• While a specific app is running
• While a specific app is running and is frontmost
• While your Mac's battery is charging and/or when the battery is above a threshold
• While your Mac's power adapter is connected or disconnected
• While your Mac has a specific IP address
• While your Mac is on a specific Wi-Fi network
• While your Mac is connected to Cisco AnyConnect VPN service
• While your Mac is using a specific DNS servers
• While headphones or another audio output is in use
• While a specific drive or volume is mounted
• While your Mac's CPU is being utilized to a specific threshold
• When your Mac has been idle for a specific threshold

=== What's the Catch? ===

No catch. Amphetamine is 100% free. It's a gift from me to you. Enjoy!

• No advertisements
• No in-app purchases
• Nothing to unlock/no "pro" version
• No annoying prompts asking you to review Amphetamine
• No links for other paid apps
• No tracking
• No data-harvesting

=== What Else Does Amphetamine Do? ===

Amphetamine is the most powerful and customizable keep-awake utility ever created for macOS. Some other notable features are:

• Lock your Mac's screen after a period of inactivity
• Move the mouse cursor periodically
• Keep your MacBook awake while its display/lid is closed
• Keep your drive awake with Drive Alive
• AppleScript support
• Use your own menu bar icons
• Use your own notification sounds
• Allow your display to sleep while keeping your Mac awake
• Allow screen saver to run after a customizable period of inactivity
• Optional session time remaining display in the menu (with 12/24 hour support)
• Auto-end session if your Mac's battery is low
• Hot key support for starting/ending sessions, enabling disabling display sleep, and more

=== System Requirements + Other Details ===

• Amphetamine requires macOS 10.11 El Capitan or higher; some features require a higher version of macOS
• Amphetamine supports Retina displays and macOS dark mode.

What’s New

Version 5.1

• Initial macOS Big Sur support *
• Amphetamine is now a Universal app **
• Moved While App Is Running & Other Time/Until windows out of popover and into submenus for macOS Big Sur and beyond
• Fixed an issue with AppleScript not accepting 0 as an interval when trying to start an indefinite session

* This update provides initial macOS Big Sur support, but there is still more work to be done. Due to significant visual changes in macOS Big Sur, some of Amphetamine's visuals and UI are not fully optimized. For example, alerts may contain more text than can fit in the new maximum alert window size and may require scrolling to view all content.

** I do not yet have an Apple Silicon MacBook. I cannot confirm that all features, especially closed-display mode, function as expected on Apple Silicon Macs. I don't know when I will be able to purchase a new MacBook to fully test Amphetamine on the Apple Silicon platform.

Ratings and Reviews

4.7 out of 5
289 Ratings

289 Ratings

JohnStanleyUK ,

Awesome little app

Huge thanks to the developer for this app. It’s completely free, no adds or nags, and works in a very smooth and seamless way. Absolutely no stability issues or crashes etc.

I use it when I am uploading vast amounts of files via FTP overnight, or indexing big websites locally which can take hours. Despite playing around with system settings, my mac seems determined to sleep or lock itself after a while, hence my need for something like this. It’s an absolute lifesaver for me, and a key part of my workflow now.

Once again, many thanks for the developer for creating and supporting this awesome app.

Developer Response ,


cheerluka ,

An excellent tool.

I needed a solution for my Mac that would allow me to keep sleep on... but disable it ONLY when certain apps are running, like Lightroom or my backup client. This has been by far the most polished experience I've used, from the advanced functionality that triggers offer right down to the beautiful design of the app - it really ticks all the right boxes for a macOS app. And it's free?! Please chuck a coffee the developer's way if you have the money spare and enjoy this app - I know I owe him one for sure for the amount of help this app has been.

Developer Response ,


GufPhoto ,

From Caffeine to Amphetamine

Caffeine was a pure simple go to no nonsense app that did a very fine job. I bumped in to this whilst seraching through for something unrelated... as you do. Only thought to try out Amphetamine given the reviews and as Caffeine was not updated in a very long time but my systems have moved on i gave it a go. Amphetamine is another step up hands down, and wow there are options for everyone to tailor to suit thier uses. 'Triggers' are a great option, and the app is solid and stable. Massive Kudos to the William for puttting this great app out there and for free is truly generous.

Developer Response ,



William Gustafson
5.4 MB

OS X 10.11 or later


English, Simplified Chinese

Age Rating


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.