This allows you to give the batch of files an entire new base name. Use the Custom Format box to insert the base name of the files.

Step 3: You can use any of the dropdown boxes to establish renaming rules however you would like, but I personally like using Format instead of Add Text or Replace Text for the renaming style. This will open the Rename Finder Items box.

Step 2: Right click, and select Rename Items.

Step 1: Select the files that you wish to rename. Instead of relying on a third party app, use this handy tip to quickly rename a batch of files without breaking a sweat.

Interface languages are available in English, French, German, Japanese, Spanish, Italian, Simplified and Traditional Chinese.Renaming multiple files can be a tedious process when doing so manually, but the Finder in OS X can make it easier to rename a batch of files at once on your Mac.

Change skins to get different visual experience.

Order files and folders by clicking columns like path and type.

Click the arrowhead button on the Mac file renamer's interface to move file or folder's position simply.

Changes could be applied to filename, extension, or both of them as you like.

Multiple ways to realize positioning, such as from beginning/end and after/before a string options.

'Search for' and 'Replace with' options for you to replace character(s) easily.

start position, increment, and digit, so you can choose any position to add the order number as you like. ImTOO File Rename for Mac provides you abundant settings for format of order number, e.g.

Add sequence number to file and folder names.

Several ways to define current and target position according to your own need for moving character, besides, you can choose the number of character(s) to move or delete from '1' to '99'.

Delete & insert string in any position of the filename.

Case change like upper or lower any letter or string in filename or extension on your Mac is very easy.

File renamer for mac