Here's how you can use the Get Info menu to rename a file in OS X Mountain Lion. 1. Select the file. 2. Press Command + I on your keyboard (or select File then Get info from the file's menu in the menubar). 3. Go to the Name & Extension tab. 4. Select the current name of the file. 5. Type in your new name.
Use the Get Info window in Mac OS X | Daily Mac Tips