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DisablingBells/iTerm
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This will silence the terminal bell in iTerm, and won't replace it with a visual bell. It will still be silenced when connected to remote machines.
Quit iTerm
Change the bell setting in Property List Editor
Open ~/Library/Preferences/net.sourceforge.iTerm.plist in Apple's Property List Editor you need to have XCode installed to get the Property List Editor by navigating to it and double-clicking it in Finder
Expand Root
Expand Terminals
Expand Default
Click "No" to the right of "Silence Terminal Bell" and change it to "Yes".in version 0.9.6.20090209 the value "Silence Terminal Bell" is gone from the conf file. You need to manually add it as boolean and set it to "true"
File > Save (Command-S)
Property List Editor > Quit Property List Editor (Command-Q)
Open iTerm. The bell should be silenced!
Notes