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Hey folks, I have an application that ships a CoreMedia I/O system extension to create a virtual camera. We separately ship an "uninstaller" app, which is a notarised AppKit app. This uninstaller removes the app, containers, and the system extension via the following API: let request = OSSystemExtensionRequest.deactivationRequest(forExtensionWithIdentifier: pluginIdentifier, queue: .main) request.delegate = self OSSystemExtensionManager.shared.submitRequest(request) The OSSystemExtensionRequest API does correctly deliver metadata via propertiesRequest(forExtensionWithIdentifier: …), but when we attempt to remove the extension using the above snippet, we get a failure OSSystemExtensionError.extensionNotFound. The uninstaller app is signed with the same entitlements and certificate as the host app. It also embeds a copy of the system extension as required by the API. I think the crux of the issue is: Should this be expected to work? We're all code-signed correctly etc, and the only difference is that the removal request is coming from an app with a different bundle identifier to the one that installed it start with. Thanks!