2016/06/30
Mac app “StartNinja” can silence Mac startup sound
The startup sound that sounds when you start up your Mac.
If you want to eliminate this, why not try using StartNinja
Price: Free (at the time of article publication)
How to set up “StartNinja”
Launch "StartNinja" and click "Get Current Setting*". ↓
If prompted, enter your password. ↓
Set "System Startup Chime*" to "OFF". ↓
With this, you can silence the startup sound that sounds when your Mac starts up.