I'm trying to implement a MediaDeviceExtension, but it is not being launched. I followed the documentation, but I see "missing required entitlement" in log, even though I've added the entitlement. My Setup com.apple.developer.media-device-extension on both the app and the extension: <key>com.apple.developer.media-device-extension</key> <array> <string>media-device-protocol.myradio</string> </array> The same id is in the extension’s UTExportedTypeDeclarations → UTTypeIdentifier (conforming to public.media-sharing-protocol) and in the Swift protocolType property. The app’s Info.plist has MDESupportedProtocols with the same id. EXExtensionPointIdentifier = com.apple.media-device-extension in EXAppExtensionAttributes. The capability is enabled on both App IDs in Certificates, Identifiers & Profiles. Problem Opening an AVRoutePickerView does not call startDeviceDiscovery(), and no device appears in the picker. Device log: -FigCustomEndpointManager- manager_shouldAllowDiscoveryForProtocol: Protocol media-device-protocol.myradio has never been activated - allowing discovery for first-time use -FigCustomEndpointManager- manager_SetDiscoveryMode: Failed to launch system casting instance for protocol media-device-protocol.myradio -MXAppExtensionMonitor- -[MXAppExtensionInstance launchExtensionRequiring:]: Extension with identifier: <_EXExtensionIdentity: 0x…> is missing required entitlement, dropping! -MXSystemMediaCasting- -[MXSystemCastingExtensionInstance launch]: Failed to launch <SystemMediaCastingExtension<MyRadio:media-device-protocol.myradio>: …, <EXExtensionProcess: (null) PID: 0>, 0> Question What entitlement is MXAppExtensionMonitor checking for when launching a SystemMediaCastingExtension? It is not named in the log. If an entitlement beyond com.apple.developer.media-device-extension is required, how is it obtained? FB23043277

We ran into a bug with our app Bezel (https://getbezel.app). When running on macOS Tahoe, windows would get partially clipped. This is because we have SwiftUI views that are larger than the window size, our SwiftUI views are supposed to be centered, which they are on macOS 13, 14, 15. But on macOS 26 (beta 1), the window contents are top-left aligned. This seems to be a bug, I have submitted FB18201269. This is my code: WindowGroup { ZStack { Color.green ZStack { Color.yellow Text("Hi") } .aspectRatio(1, contentMode: .fill) .border(.red) } } This first screenshot shows the old behavior on macOS 15: This second screenshot shows the new behavior on macOS 26 (beta 1) Can anyone confirm if this is indeed a bug, or if this an intended change in behavior?