Want to re-enable the startup boot chime sound effect on a new Mac? You can do that with a command line string entered into the Macs Terminal. As you may know, new Macs default to not making a startup boot chime sound effect, this is in contrast to every prior Mac model which included a boot sound effect.
With a little effort, you can enable the boot startup sound effect on modern Macs however, including newer model MacBook Pro, MacBook Air, MacBook, iMac, Mac mini, and Mac Pro.
How to Enable Startup Chime on Macs
Here is how you can enable the Mac startup boot…