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How to preview batch file names on Mac

Preview numbered photo filename changes in File Renamer Pro on Mac and check individual results before renaming any files.

4 stepsUpdated 12 Nov 2026Get File Renamer Pro
What you'll achieve
You can review proposed names such as Summer-Trip_001.jpg and inspect the original and proposed names for a chosen photo without changing the files.
What you need
  • File Renamer Pro for Mac.
  • A folder of photos you are permitted to rename.
File Renamer Pro on Mac showing numbered Summer-Trip filename previews and the Evidence inspector for a selected photo, on a teal background.

File Renamer Pro can preview a numbered naming pattern across a group of photos before you make changes. This walkthrough imports a sample photo batch, configures an index-based mask, and checks the proposal for one selected file.

  1. 1.Import your photos into the batch

    In File Renamer Pro, use Add Files to import the photos you want to rename. Check that the Original Name column lists the files you selected; the original filenames remain unchanged.

    File Renamer Pro showing 60 imported JPEG photos in Original Name before a rename pattern is configured.
    File Renamer Pro showing 60 imported JPEG photos in Original Name before a rename pattern is configured.
  2. 2.Set a numbered filename pattern

    Open Naming, choose Mask, and enter Summer-Trip in New Name. Select Index for Differentiator and 3 for Index Padding. The New Name column previews names such as Summer-Trip_001.jpg before any rename is applied.

    Naming inspector with Summer-Trip, Index and 3-digit padding; the New Name column previews Summer-Trip_001.jpg and successive numbered filenames.
    Naming inspector with Summer-Trip, Index and 3-digit padding; the New Name column previews Summer-Trip_001.jpg and successive numbered filenames.
  3. 3.Select a filename to review

    Select a row in the list to inspect one proposed rename. In this example, selecting IMG_2017.jpg highlights its proposed name Summer-Trip_017.jpg while the full batch remains in preview.

    Photo IMG_2017.jpg selected in the batch list, with proposed name Summer-Trip_017.jpg.
    Photo IMG_2017.jpg selected in the batch list, with proposed name Summer-Trip_017.jpg.
  4. 4.Verify the original and proposed names

    Open Evidence. Compare Original Name (IMG_2017.jpg) with Proposed Name (Summer-Trip_017.jpg), and confirm Status is Include. Review other rows before using Rename All; this guide does not apply the rename.

    Evidence inspector comparing original IMG_2017.jpg and proposed Summer-Trip_017.jpg, with Status Include.
    Evidence inspector comparing original IMG_2017.jpg and proposed Summer-Trip_017.jpg, with Status Include.

Tips

  • Use Index Padding set to 3 for three-digit numbering such as 001, 002 and 003.

  • Check more than one row under Evidence before applying a large batch.

  • Watch outThis workflow stops at preview. Rename All applies the proposed changes to files; do not use it until you have checked the names and destination.