Is there a way to hide all file extensions in OS X? Is there any way to globally hide every single file extension in OS X? I've seen the option in the Get Info menu to hide the selected file's extension, but I'd like to never see a file extension unless I chose to.
In the Finder, selected the Preferences menu item from the Finder menu. Click the Advanced Tab. Make sure to un-check Show all filename extensions. Close the window.



I had thought this was unset by default, but perhaps not.