Set the Volume Level to a Hidden Ultra Low Setting in Mac OS X
Mac OS X has a hidden super quiet volume setting that is somewhere between completely muted and the lowest volume level, here’s how to access it:
- Use the Volume Decrease key (F10 or F11) until the volume is muted, signified by the volume graphic with a slash through it
- Now press the Mute key (F9 or F10) to see the slash disappear and the volume level set at zero bars
The audio output level is now set at the super quiet setting, with sounds just barely audible enough that you can identify them. This is a perfect setting to couple with temporarily muting the boot sound for using a Mac in meetings, libraries, classrooms, or other places where silence is necessary, allowing you to continue to hear audio without distracting others.
Update: The precise keys vary depending on the Mac and Apple keyboard in use. Newer MacBook models may be F10 and F11 rather than F9 and F10, you may want to focus on the keys icons rather than the label instead to be sure.
Nice tip from CultofMac