If you change an extension, you may no longer be able to open the file with the app that was used to create it. If this doesn’t help, you may need to reinstall the software.)įilename extensions-the period followed by a few letters or words that you see at the end of some filenames (for example. (If you change the name of an item and experience problems, change the name back. These are some items you should not rename:Īpp folders and any items that came with your system, such as the Library folder. Enter a name in the Custom Format field, then enter the number you want to start with. Replace text: Enter the text you want to remove in the Find field, then enter the text you want to add in the “Replace with” field.Īdd text: Enter the text you want to add in the field, then choose to add the text before or after the current name.įormat: Choose a name format for the files, then choose to put the index, counter, or date before or after the name.

In the pop-up menu below Rename Finder Items, choose to replace text in the names, add text to the names, or change the name format. On your Mac, select the items, then Control-click one of them.

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File renamer