The Mac startup chime was created by Apple sound designer Jim Reekes for the Macintosh Quadra line in the early 1990s, voiced as a bright F major chord inspired by the final chord of The Beatles' A Day in the Life. Different Mac models used variants for years until newer machines quietened or dropped it, which only made recordings more nostalgic online. Editors now reuse it in memes and tech videos, sometimes layered after a ding sound effect, to signal a system, idea, or person coming back to life.