Silence the startup chime: All Mac users are familiar with the iconic startup chime that strikes as soon as you startup.
Silence the startup chime
This is fine for most of us although you might want to startup your Mac in a situation where silence is of greatest importance, such as in a meeting, lecture or library. If so, there is a very simple method of silencing the chime temporarily. Is this a complicated process? Do you need developer tools to enable this? Not at all!
This is probably one of the most simplest and easiest tips we should really all know by now:
Simply hold down the Mute key at startup, or, if you’re au fait with Terminal you can run this command:
sudo nvram SystemAudioVolume=%80
You’ll be asked to enter the admin password and, if neither of the above suit you there is an app called Silent Start by Tunabelly Software that does the same thing.
Want to know how to hide the menu bar? read this
Want to know about startup key combos?
Command (⌘)-R: Start up from the built-in macOS Recovery system. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the Internet. macOS Recovery installs different versions of macOS, depending on the key combination you use while starting up. If your Mac is using a firmware password, you’re asked to enter the password.
Option (⌥): Start up to Startup Manager, which allows you to choose other startup disks or volumes, if available. If your Mac is using a firmware password, you’re asked to enter the password.
Option-Command-P-R: Reset NVRAM or PRAM. If your Mac is using a firmware password, it ignores this key combination or starts up from macOS Recovery.
Shift (⇧): Start up in safe mode.
D: Start up from the built-in Apple Hardware Test or Apple Diagnostics utility, depending on your Mac model. Or use Option-D to start up from this utility over the Internet.
N: Start up from a NetBoot server, if your Mac supports network startup volumes. To use the default boot image on the server, hold down Option-N instead.
Command-S: Start up in single-user mode. This key combination requires macOS High Sierra or earlier.
T: Start up in target disk mode.
Command-V: Start up in verbose mode.
Eject (⏏) or F12 or mouse button or trackpad button: Eject removable media, such as an optical disc.
