Why exported screen recordings are silent: macOS splits audio into two AAC tracks
gaganghotra_ · x · 2026-10-18
A TIL with broad utility: macOS screen recordings export silent because the recorder stores system audio and mic as two separate AAC tracks, while export and most players keep only the first track — the editor plays both, which is why recordings sound fine live. The screenshot shows the fix planned and built via an AI coding agent (Grok 4.7 in Cursor).
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