That familiar and, dare I say, invigorating chime that signals the startup of your Mac computer is officially dead, at least on the new MacBook Pro.

Don't worry, it's still available on older Mac desktops and laptops, but on the latest MacBook Pro, which was unveiled on Thursday, Apple has decided to ditch the startup sound many Mac fans know and love.

The discovery was made on Friday by a Mac user named Dan who took note of the lack of a "startup sound" description in the new support notes describing how to reset NVRAM on late 2016 MacBook Pro models.

That F-sharp chord sound was immortalized in the 2008 Pixar film Wall-E, when an animated robot used solar panels to recharge itself. The sound is so loved and recognizable that Apple even filed a trademark on the sound.

Although Apple hasn't directly commented on the change, it makes sense now that the new MacBook Pros boot up automatically when you open the lid, according to 9to5Mac.

Without the need to press the power ON button, this change allows you to quietly open the lid and turn on the computer without signaling to the world that you're starting up your computer.

Nevertheless, the loss of that classic sound is a tiny piece of Apple history that will be missed by many.