Psst is a free Mac utility developed by Satsumac Software that addresses the issue of the sometimes disruptive startup sound on Mac computers. If you've ever been in a situation where the loud boot-up sound attracted unwanted attention, Psst provides a simple solution. This tiny app allows you to adjust the volume level of the startup sound, giving you the option to increase, decrease, or completely mute it.

By enabling Psst and making the desired adjustments, you can bid farewell to those awkward moments caused by an overly loud Mac startup sound. Say goodbye to unexpected disruptions in quiet environments or public spaces with this handy tool.