How to disable the Finder’s extension change warning

To carry on with my ‘how to disable’ series, here’s a simple but useful tip.

Do you find that the OS X Finder’s warning dialog to be fairly irritating when you’re deliberately changing file extensions? You know what you want to do and you don’t need the Finder to constantly keep checking that this is OK with you!

If you decide that you don’t want to keep getting the extension change dialog warning as shown below, this can be disabled.

How to disable the Finder's extension change warning.

To remove the file extension dialog warnings, all you need to do is log in as an admin user and enter one line of command in the Terminal application (located in /Applications/Utilities/) as shown below:

defaults write com.apple.finder FXEnableExtensionChangeWarning -bool false;killall Finder

If you do want to revert back to the default setting, just enter the following command:

defaults write com.apple.finder FXEnableExtensionChangeWarning -bool true;killall Finder

Disclaimer:

While the author has taken care to provide our readers with accurate information, please use your discretion before acting upon information based on the blog post. Amsys will not compensate you in any way whatsoever if you ever happen to suffer a loss/inconvenience/damage because of/while making use of information in this blog.

This feature has been tested using OS X v10.8.4 which was the latest Mac OS release at the time of writing.

2 Replies to "How to disable the Finder’s extension change warning"

  • Hi Russell
    No need to do this in terminal.
    Just go the finder preferences, advance tab, and deselect “Show warning before changing an extension”

    Can do this in OSX 10.6 also

    Regards
    Carl

  • Hi Carl. Indeed, there is an option in Finder preferences for this, but it’s useful for administrators to have an option without toughing the Graphical Interface for assisting users remotely.
    Thanks
    Russell

Leave a Reply

Your email address will not be published. Required fields are marked *