2019 Mac Pro Startup Sound! The "BONG" is back!

Just a quick video to show you how to enable the startup “BONG” sound on the 2019 Mac Pro, Macbook Pro, and Macbook! It works! Just type this to enable: …


  1. That startup sound is way better than the startup sound of the original iMac (even though it's technically the same according to MacTracker, it's just the T2 chip that causes the distortion and lower pitch)

  2. So far confirmed to work on many Mac models using Mojave or Catalina.

    Original (partial) source from Jan 2020:

    Does not give absolute date, only relative date of “1 month ago”.
    “SINdicate 1 point 1 month ago

    Wild guess: sudo nvram StartupMute=%100”

    To disable, do anyone of these 4:
    – Type sudo nvram StartupMute=%01
    – Type sudo nvram -d StartupMute
    – reset PRAM on startup (press and hold CMD (⌘)-OPT(⌥)-P-R on startup)
    – turn off and pull plug on desktop Macs (not all models)

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