App is running in the background warning message on MacOS 26 Tahoe

Is this for an app that you’re developing?

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

Yes, all these applications developed by our team. But also observed similar message appeared in Adobe application too. Upon closing the running application observing the warning message.

Thanks for the context.

This is indeed a new feature in macOS 26 beta. We don’t yet have documentation about it, partly because the exact feature set is in flux.

If you’re seeing this with your apps, I can certainly help you with that. I’ll come back to that below.

If you’re seeing this with apps from other third-party developers, you should contact their support resources about it.

The general idea behind this feature is that apps should quit when the user tells them to quit. That is, an app shouldn’t continue running in the background with no visibility to the user. But macOS is pretty flexible about what that visibility might be. For example, the app might display a status item in the menu bar, show up in System Settings > General > Login Items & Extensions, and so on on. Speaking as a Mac user, this is the sort of thing I like in my apps, and macOS 26 beta is enforcing it at runtime.

So, what does your app do in the background? And how is that background code executed?

Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"