Things You'll Need:
- Mac OS 9.0
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Step 1
Click the Apple menu and select Control Panels.
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Step 2
Click Monitors & Sound.
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Step 3
Click the Sound icon. You can then mute the Computer System Volume.
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Step 4
Click the Alerts icon to mute the System Alert Volume (the warning beep). When you do so, the Finder menu bar flashes instead.
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Step 1
Click the Control Strip tab if the Control Strip is hidden. Locate the Sound Volume icon - it looks like a speaker.
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Step 2
Click the Sound Volume icon. A volume slider pops up.
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Step 3
Grab the slider and slide it down to the lowest volume. Let go of the slider.






