Hi Robert, Short answer: no. Inter-App Audio was iOS-only, it was deprecated years ago (iOS 13), and Apple Music never published an IAA node anyway. There is no equivalent on macOS, and no app — Apple's or otherwise — hands you its render buffers through it. ▎ ▎ What you actually want is a system/process audio tap. On macOS you have three realistic routes: Core Audio process taps (macOS 14.2+, Apple's sample targets 14.4) — this is the modern, official one. CATapDescription + AudioHardwareCreateProcessTap, then wrap it in an aggregate device and pull from it like any other input. You can scope the tap to a specific process (Music.app) or to the whole default output. Requires the audio-capture TCC permission (NSAudioCaptureUsageDescription in your Info.plist), so the user gets a one-time prompt — no driver install, nothing to uninstall later. See Apple's "Capturing system audio with Core Audio taps" sample. ScreenCaptureKit (macOS 13+) — SCStream with capturesAudio = YES and a content filter limited to the Music app. It works and it's well documented, but it drags in the Screen Recording permission, which is a much scarier prompt for a user who just wants a spectrum analyzer. I'd only go here if you need to support 13.x. A loopback/virtual device — BlackHole (free, open source) or Rogue Amoeba's Loopback. Zero API work on your side: your app just opens an input device. The cost is that the user has to install a driver and re-point Music's output, which is exactly the kind of setup friction you're trying to avoid. Two caveats worth testing early, because they can sink the whole idea: DRM. Tracks streamed from the Apple Music catalog are protected content. Purchased/matched/local files are fine, but I would write a 50-line proof of concept that taps Music.app playing a streamed catalog track before you build anything on top of it — if the tap comes back silent, you know now instead of after the UI is done. Format. A tap gives you the mixed output at the device's format, so expect 44.1/48k float, and be ready for the sample rate to change under you when the user switches tracks or devices. And if you were hoping to do this on iOS: don't. There's no system audio capture there at all. MusicKit / MPMusicPlayerController will let you drive playback and read metadata, but the samples never touch your process. Best, Mabel