HOW TO RENAME A FILE ON A MAC
Method 1: Rename a file or folder by selecting it and hitting the ‘return’ key
Just click on the icon of the file/folder from the OS X Finder, and then hit the return key, then type in the new name. This is quick and simple, and likely the most traditional method of renaming on the Mac.
Method 2: Rename a file or folder by selecting it and clicking on the filename with your cursor
Super simple and done through the Finder, here’s what you want to do: after you have selected the icon, click on the actual filename text and hover for a moment with the mouse cursor, you’ll see the text highlight which indicates that you can then rename the item. Type in the new name, then hit return or click away with the mouse cursor to set the change.
Method 3: Using right-click and choosing “Rename” from the menu
If you right-click (or control+click) on a file name in the Finder of modern versions of OS X, you can choose a “Rename” option to rename a specific file, or use it to rename multiple files at a time if multiple files are selected. This works great, but it’s only available to the newest versions of OS X.