Disable the File Extension Change Warning in Mac OS X

[Geek]

<div class="KonaBody"><p><img src="http://osxdaily.com/wp-content/uploads/2012/04/file-extension-warning.jpg" alt="File Extension change warning in OS X" title="file-extension-warning" width="620" height="300" class="aligncenter size-full wp-image-29324" /></p>

<p>Assuming you have <a href="http://osxdaily.com/2012/01/13/show-filename-extensions-in-mac-os-x/">file extensions shown in</a> the OS X Finder, attempting to change a file extension causes a warning dialog with a confirmation box to appear. This is annoying if you know what you’re doing and you have a compelling reason to change extensions, so let’s turn it off using the command line and defaults write.</p>

<p>First, open the Terminal, located within the /Applications/Utilities/ directory, then copy and paste in the following command:</p>

<p><code>defaults write com.apple.finder FXEnableExtensionChangeWarning -bool false</code></p>

<p>Follow that up by relaunching the Finder with killall:</p>

<p><code>killall Finder</code></p>

<p>To reverse the change and get the warning back when you attempt to change file extensions, use the following defaults write command:</p>

<p><code>defaults write com.apple.finder FXEnableExtensionChangeWarning -bool true</code></p>

<p>Kill the Finder again for changes to take effect.</p>

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