When I try to rename a file (by pressing enter, then changing the extension of the file), it pops up with an alert asking "Are you sure you want to change the extensions ... " and the old extension is selected in blue. I haven't found a keyboard shortcut for selecting the new extension from the popup alert. Is there a way? I need to rename dozens of files, and doing it all through the keyboard would be so much quicker than selecting this one alert with a mouse.


You can disable the prompt under Finder's Preferences (see picture below):

enter image description here

This might save you some time if you are renaming multiple files. Additionally, you may want to look at Rename. It is a free utility that should serve you well for such simple batch renaming.


There is no keyboard equivelant that I am aware of...

You could however use the terminal to make your life a little easier. If you need to rename the files one at a time, use the command

mv orig_file_name.ext new_file_name.newext
  • I discovered Cmd-U works for accepting the file extension change. – Z S Sep 23 '11 at 8:50
  • Nice! I will have to try that. – TheWellington Sep 28 '11 at 19:04

Those buttons highlighted in blue (e.g in your case "keep old") press enter; for those button with a blue background (e.g in your case "Use ...") press space bar.

Extension Text Box

  • 1
    Make sure that you have full keyboard access set to "All Controls" - ctrl + F7 toggles this feature – Samantha Catania Sep 23 '11 at 9:08

After trial-and-error, figured it out. It's +U.


In Mountain Lion, + A works like a charm

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