--- title: Detecting the focused window on macOS in SwiftUI | daily.dev description: The `controlActiveState` environment value for detecting window focus in SwiftUI on macOS has been deprecated since macOS 15. The replacement is... canonical: https://daily.dev/posts/detecting-the-focused-window-on-macos-in-swiftui-fbhwv7mrw twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Detecting the focused window on macOS in SwiftUI | daily.dev og:description: The `controlActiveState` environment value for detecting window focus in SwiftUI on macOS has been deprecated since macOS 15. The replacement is... og:url: https://daily.dev/posts/detecting-the-focused-window-on-macos-in-swiftui-fbhwv7mrw og:image: https://api.daily.dev/og/posts/FbHWV7mrw.png og:image:alt: Detecting the focused window on macOS in SwiftUI og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Detecting the focused window on macOS in SwiftUI **[Nil Coalescing](https://daily.dev/sources/nilcoalescing)** · 1 min read · 0 upvotes · 0 comments ## Summary The `controlActiveState` environment value for detecting window focus in SwiftUI on macOS has been deprecated since macOS 15. The replacement is `appearsActive`, a boolean environment value that is `true` when the window is focused and `false` otherwise. A code example shows how to read this value and react to focus changes using `onChange`, useful for adjusting UI appearance or triggering actions when a window becomes inactive. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [SwiftUI FocusState: A Little Pitfall I Fall Into](https://daily.dev/posts/swiftui-focusstate-a-little-pitfall-i-fall-into-zupik4ecv) · gitconnected · 0 upvotes · 0 comments - [Using SwiftUI to Build a Mac-assed App in 2026](https://daily.dev/posts/using-swiftui-to-build-a-mac-assed-app-in-2026-osppvd4pe) · Lobsters · 2 upvotes · 0 comments - [How native SwiftUI controls look different in iOS 26](https://daily.dev/posts/how-native-swiftui-controls-look-different-in-ios-26-abwxnqlub) · Sarunw · 1 upvotes · 0 comments - [SwiftUI data dependencies and their effect on view updates](https://daily.dev/posts/swiftui-data-dependencies-and-their-effect-on-view-updates-2kp42i6if) · Nil Coalescing · 1 upvotes · 0 comments --- Tags: [#swift](https://daily.dev/tags/swift), [#mac](https://daily.dev/tags/mac), [#swiftui](https://daily.dev/tags/swiftui) [View this post on daily.dev](https://daily.dev/posts/detecting-the-focused-window-on-macos-in-swiftui-fbhwv7mrw) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Detecting the focused window on macOS in SwiftUI","url":"https://daily.dev/posts/detecting-the-focused-window-on-macos-in-swiftui-fbhwv7mrw","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/detecting-the-focused-window-on-macos-in-swiftui-fbhwv7mrw"},"datePublished":"2026-08-02T07:15:14.768Z","dateModified":"2026-08-24T07:01:55.335Z","description":"The `controlActiveState` environment value for detecting window focus in SwiftUI on macOS has been deprecated since macOS 15. 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