I get the message "objc[29459]: class `NSKVONotifying_AVCapturePhotoOutput' not linked into application" and I do not seem to be able to process a captured photo. Users on stackoverflow are seeing this too (using Swift): https://stackoverflow.com/questions/76893120/unable-to-capture-and-save-image-using-avcapturephotooutput-in-macos-app I am running Ventura 13.0.1. Minimal example: #import <AVFoundation/AVFoundation.h> @interface PhotoCaptureDelegate : NSObject <AVCapturePhotoCaptureDelegate> @end @implementation PhotoCaptureDelegate - (void)captureOutput:(AVCapturePhotoOutput *)output didFinishProcessingPhoto:(AVCapturePhoto *)photo error:(nullable NSError *)error { if (error) { NSLog(@"Error capturing photo: %@", error.localizedDescription); } else { NSLog(@"Ready to process photo."); } } @end int main(int argc, const char * argv[]) { @autoreleasepool { AVCaptureSession *captureSession = [[AVCaptureSession alloc] init]; AVCaptureDevice *captureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; if (captureDevice) { NSError *error = nil; AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:captureDevice error:&error]; if (!error) { [captureSession beginConfiguration]; [captureSession addInput:input]; AVCapturePhotoOutput *photoOutput = [[AVCapturePhotoOutput alloc] init]; [captureSession addOutput:photoOutput]; [captureSession commitConfiguration]; [captureSession startRunning]; // Create and configure a capture connection AVCaptureConnection *connection = [photoOutput connectionWithMediaType:AVMediaTypeVideo]; if (connection) { // Configure settings for the photo capture AVCapturePhotoSettings *photoSettings = [AVCapturePhotoSettings photoSettings]; //[photoSettings setFlashMode:AVCaptureFlashModeAuto]; // Set the flash mode if needed PhotoCaptureDelegate *photoCaptureDelegate = [[PhotoCaptureDelegate alloc] init]; [photoOutput capturePhotoWithSettings:photoSettings delegate:photoCaptureDelegate]; // Capture a photo and delegate will receive the result } } else { NSLog(@"Error adding input: %@", error.localizedDescription); } } else { NSLog(@"No video capture device available"); } } return 0; } Compile with: $ clang -framework AVFoundation -framework Foundation -o test avphoto.m Any thoughts? Best regards, Linus

Hi, The metal-cpp distribution appears to only contain headers for Foundation and Quartzcore. The LearnMetalCPP download [1] provides a ZIP with an metal-cpp-extensions directory containing AppKit.hpp and MetalKit.hpp headers. First question: Are these headers distributed anywhere else more publicly? Without these headers only the renderer can be fully written in C++ as far as I can tell, i.e. no complete C++ NSApplication. Second question: Will these headers, if needed, be maintained (e.g. updated and/or extended) by Apple along side metal-cpp? [1] https://developer.apple.com/metal/cpp/ Thank you and regards.