The tone is tied to Apple's early Macintosh computers, where a chime marked startup and a different, sadder sequence signalled a serious hardware fault, a moment users came to dread. Clips of those startup and failure tones were later collected in online compilations and reused by video editors as a shorthand error sound for anything going wrong. Because the melody is instantly recognisable to anyone who used an old Mac, it still works as a nostalgic, low-key way to flag a mistake in memes and short videos today.