Amphetamine⁴ is the most awesome keep-awake utility ever created for macOS. 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.
Features like keeping your Mac awake while a file is downloading, or while an app is running are (AFAIK) exclusive to Amphetamine. Being able to provide your own status images, selecting notification sounds, multiple options for displaying the time remaining - these features exist here and there throughout other apps, but only Amphetamine collects them all into one powerful and full-featured app.
Triggers are Amphetamine's most powerful feature, allowing you to automate keeping your Mac awake based on conditions like a specific USB or Bluetooth device being connected to your Mac, the name of the WiFi network your Mac is connected to, the time of day, whether your Mac's power adapter is connected, or battery is charged to a certain level, etc. Triggers are super simple to set up and each Trigger you create can be disabled temporarily if you don't need it.
Let's all pay our respects to Caffeine. This app started it all, and is beloved around the world. Sadly, it seems to no longer be actively developed. It doesn't support Retina display, dark mode, and isn't available on the App Store anymore. Is it even a 64 bit app? Either way, Caffeine is/was certainly a great app, but a lack of updates has rendered it obsolete.
KeepingYouAwake replicates Caffeine's feature set well. Still, it lacks most of the advanced features that Amphetamine has. Both KeepingYouAwake and Amphetamine were first released back in 2014. KeepingYouAwake's goal appears to be to faithfully recreate the experience of running Caffeine, whereas Amphetamine's goal is build upon what Caffeine offered, and expand it in new and unexpected ways.
Anti Sleep looks like it has more options than the standard fare of Caffeine-clones. That said, the user interface for Anti Sleep leaves a lot to be desired. Some people complain about Amphetamine being too advanced, but the majority of Amphetamine's advanced features are hidden away in its Preferences. In Anti Sleep, it seems the goal was to cram as much as possible in the app's menu. This may appealing for some folks... but it's not my cup of tea.
Lungo seems like a nice enough app, and I believe the developer contributes to a number of open source projects (yay!) but the story here is familiar. While Lungo excels at providing a simple app that we've all seen before, it lacks any of the advanced features that make Amphetamine best in class. That said, if you're looking for a simple no-frills app, Amphetamine provides you with the same basic feature set that Lungo charges $2.99 for.
InsomniaX claims to be able to do some awesome things - like keep your Mac laptop awake while its lid is closed. Sadly, InsomniaX is not longer actively developed. The truth is, you can accomplish this with Amphetamine too. You do need to meet certain requirements to be successful, however. Read more about those requirements here.
Caffeinated, CaffeinateMe, Coca, Coffee Black!, Don't Sleep!, Double Shot, Insomniac, Jolt of Caffeine, Monster, Owly, Prevent Sleep , Sleepless, Sleeper, Taurine, Theine, etc.
Wow. Did you know the App Store was this flooded with keep-awake utilities? There's probably even more than what's on this list! All of these apps are pretty much the same. Their user interfaces might be slightly different, but they all fall short of what Amphetamine provides. These apps either show advertisements, require an in-app purchase to unlock all features, have an upfront cost, or are poorly designed (in my opinion).
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