How to turn off the changed file extension warning on Mac

Often times when trying to manipulate files on your Mac you might want to change the file type or extension of some files, right? For the most part, changing file extensions in macOS is easy. However, macOS displays a warning dialog box every time you change the file type in Finder, which can be annoying. So, here’s how to turn off the “Change File Extension” warning on Mac.

Disable Change File Extension Warning on Mac

The pesky warning dialog we’re dealing with here is there for a good reason. It helps prevent users from accidentally changing file types on their macOS devices and making files unnecessary. However, if you are reading this you know what you are doing and this warning only slows you down. So here’s how to turn it off.

  • Click Finder from the Dock. Then click on “Finder” on the top menu bar and navigate to “Preferences”. Alternatively, you can press “command + comma” to open preferences.
  • Click on the “Advanced” tab.

advanced searcher tab

  • Here, uncheck the box next to ‘Show a warning before changing an extension.’

disable modification file extension warning on mac

Once done, you can close the preferences dialog. Your Mac will no longer notify you when you attempt to change the file extension for any file. So you can play with and rename as many files as you want without ever seeing the “change file extension” warning dialog.

Easily change file extensions on Mac

Well, that’s all you need to do to get rid of the annoying warning box on your Mac. As I mentioned earlier, the warning is there for a reason, and in general, it’s best to let it stay on. However, if you’re like me and change file extensions a lot in macOS, it might be a good idea to turn off the warning box to speed up your workflow.

So, do you often change file types on Mac? If so, have you disabled the warning box or would you prefer to leave it on? Let us know in the comments below. Plus, while you’re at it, learn how to access hidden Mac settings, force apps to run with Rosetta in M1 Mac, and other step-by-step guides.


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Donald E. Hollingsworth

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