Welcome to Amphetamine 4, the most awesome keep-awake utility ever created. Amphetamine can keep your Mac, and optionally its display, 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 super intuitive and simple to use for those who don't need all 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
== Advanced Automation ==
Create a Trigger to automatically keep your Mac awake.
• While an external display is connected
• While a USB or Bluetooth device is connected
• While a specific app is running
• While a specific app is running and frontmost
• While your Mac's battery is charging and/or when the battery is above a threshold
• While your Mac's AC power adapter is connected
• While your Mac has a specific IP address
• While your Mac is on a specific WiFi network
• While headphones or another audio output is in use
• While a specific drive or volume is mounted
== 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:
• Keep your drive awake with Drive Alive
• AppleScript support
• Use your own menu bar icons
• 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
• and more!
== System Requirements + Other Details ==
Amphetamine requires macOS 10.10 Yosemite or higher
Amphetamine supports Retina displays and macOS dark mode.
Amphetamine⁴ has been completely rebuilt from the ground up to improve performance, reliability, and add awesome new features! Enjoy!
New in Amphetamine 4.0.4:
+ Added option within Power Trigger criterion to require AC power adapter to activate Trigger
+ Added option to show seconds in menu for session time remaining
+ Fix for Trigger Power criterion where logical operator 'or' was not considered correctly regarding AC adapter status
+ Fix for Trigger App criterion that prevented helper apps and processes from appearing in the list of running apps
+ Fix for Other Time/Until window placement when the macOS menu bar is hidden
+ Fix for truncated session time remaining text in menu bar for macOS 10.10 & 10.11
+ AppleScript command 'display sleep allowed' now returns button state of Allow Display Sleep preference if there is no active session
+ Further optimization to reduce CPU usage and energy impact
If you find Amphetamine useful, please consider leaving an App Store review. If you encounter an issue, please contact support through the app.
Ratings and Reviews
Very useful utility - replacement for the older Caffeine app
I started using this app about a year ago as a replacement for Caffeine. I needed more control over when sleep prevention would start, stop, etc. This app does all that and more. My primary Mac is a laptop that I use for programming and remote database work. I find Amphetamine essential for keeping the laptop from sleeping and thus killing remote database connections, VPN connections, and so on. I could go into the Energy saver preferences and tell it to never sleep, etc., but I want to leave these higher level settings alone. Amphetamine allows me to override these whenever I need and with much more precision.
One feature that I am not able to fully use in version 3.0.3, is the app trigger. This is where you can create a rule that says "while 'the specified app' (Safari, etc.) is running, don't sleep". This works well for regular applications, but I was trying to have it see a daemon type process. Even with the option to have it show more than just interactive processes, it doesn't show these background type processes from non-Apple applications. This is really a minor nit pick though. I think that if the app showed you all the processes running on the computer, it would likely overwhelm the average non-technical type user.
Apple restricts what processes sandboxed apps can see, unfortunately. Otherwise, I’d happily implement a ridiculously long list of everything running on your Mac. ❤️
Great, but not sure how "While File is Downloading..." works
First off, I want to say that it's really stupid that Apple took away the separate display sleep and system sleep controls in the Energy Saver preferences. I'm thankful something like this exists.
As for the issue mentioned in the title: that option requires the user to select a file. When I use Firefox, downloads appear as two files: one file has the correct filename, but is 0 KB in size, while the other contains data, but has .part appended to the end of it. I'm not sure which one to open, or if either one will do.
Also, about 3 versions ago, when using Amphetamine on High Sierra, I set it to stay awake indefinitely (but allow the display to sleep), and it still went to sleep (my download was interrupted). I've taken to going in to Energy Saver and preventing the display from sleeping, then turning the display's brightness all the way down, while downloading large files. I haven't tested whether or not I still need to do that. I'm wondering if launching Energy Saver after starting an Amphetamine session overrides some of Amphetamine's session settings? Or if I need to turn off the password requirement when the display sleeps?
❤️ Contact support through the app. Happy to answer these questions.
Great alternative to Caffeine!
I’ve been using the Caffeine app for a few years now to keep my computer awake, but I’ve noticed for quite some time now that it gets a little buggy displaying in the menu bar. I went to go check when it was last updated only to realize that the developer pulled it from the App Store. I was disappointed because Caffeine treated me so well for so long. I came across Amphetamine and, skeptic that it would be as good as Caffeine, decided to try it out. To my surprise, it does exacty what I want and even more. Admittedly, I was extremely disappointed with the default menu bar icon, but there is an option to change it to one of several other icons, including one that looks similar to Caffeine’s coffee cup icon (empty when inactive and full when active). Another nice touch is that you can have the icon dimmed to gray when Amphetamine is inactive. If you are a Caffeine user looking for a much-needed update, definitely give Amphetamine a try.
With Family Sharing set up, up to six family members can use this app.