Many external monitors connected via HDMI or DisplayPort have fixed-volume audio output — macOS shows the volume slider grayed out - chenjy16/SoundBridge

LensFlowPro is a lightweight, native macOS screen recorder built for creators, developers, and educators. Capture professional-quality tutorials, demos, and presentations effortlessly. Key Features: System & Microphone Audio Mouse Highlights & Zoom Camera Overlay / Presenter Mode (macOS 14+). Battery-Friendly & Optimized* Local & Private