The Secret Behind the Iconic MacOS Sound “Sosumi” | June 12 2026, 11:47

Did you know that the MacOS notification sound had a name, and it was Sosumi? It was used from 1991 to 2020, then replaced by Sonumi. It has an author. It’s Jim Reeks — an Apple sound designer, and there’s a secret that wasn’t disclosed until 10 years after he left the company.

So, there was Beatles’ Apple Corps. The logo — also an apple. They had a lawsuit with Apple Inc. => Apple Inc. could use the name, but with no right to enter the music industry. When it came to creating OS sounds, lawyers got tense: Reeks, no names like “Chime” or anything, no melodies in the sounds. As a result, in OS appeared sounds like Frog, Funk, Glass, Hero.

Reeks worked long on the boot sound and created a C major chord 🙂 He writes that while creating the C major chord he was inspired by The Beatles’ song “A Day in the Life.” (I don’t know why I’m laughing here). He then jokingly suggested the name “Let it Beep” in the style of The Beatles song. It didn’t fly. Someone said it would lead to a lawsuit. Reeks: “So sue me”! He claims he sold it to the management as a “Japanese word, having nothing to do with music.”

In macOS Big Sur, the sound is now different — Sonumi. The sound file itself in /System/Library/Sounds/ is still called Sosumi.aiff.

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