Disable file extension warning in OS X

Turn off warning when changing file extensions on your Mac

Here's how you can disable the annoying warning that appears when you go to change a file extension in OS X on your Mac.

1. Open a terminal window.

2. Type in the following command then hit Enter.

defaults write com.apple.finder FXEnableExtensionChangeWarning -bool false

For more, see the original article at the link below.

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How to Remove Annoying “Pop Up” Warnings & More in Lion | Amsys

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