Hello, thanks for the help. I read those documentation pages too but I couldn't understand how to implement the solution. I will show my code with the errors and I hope you will can help me better. I am developing a video capture app for MacOS using SwiftUI. Here is my custom view to show the preview from the camera. Take a look to the function setupBraille(). When I try to compile the project XCode gives me these errors: Value of type 'CameraPreviewLayout' has no member 'accessibilityBrailleMapRenderer' Unable to infer type of a closure parameter 'map' in the current context Here is my code: import SwiftUI import AVFoundation import Accessibility struct CameraView: NSViewRepresentable { let captureSession: AVCaptureSession init(captureSession: AVCaptureSession) { self.captureSession = captureSession } func makeNSView(context: Context) -> CameraPreviewLayout { return CameraPreviewLayout(captureSession: captureSession) } func updateNSView(_ nsView: CameraPreviewLayout, context: Context) { } } class CameraPreviewLayout: NSView, AXBrailleMapRenderer { var previewLayer: AVCaptureVideoPreviewLayer? required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") } init(captureSession: AVCaptureSession) { previewLayer = AVCaptureVideoPreviewLayer(session: captureSession) super.init(frame: .zero) setupLayer() setupBraille() } func setupLayer() { previewLayer?.frame = self.frame previewLayer?.contentsGravity = .resizeAspectFill previewLayer?.videoGravity = .resizeAspectFill previewLayer?.connection?.automaticallyAdjustsVideoMirroring = false previewLayer?.connection?.isVideoMirrored = true layer = previewLayer } func setupBraille() { self.accessibilityBrailleMapRenderer = { map in // code to manage the braille display } } }