Bulk rename files right inside Finder

"IMG_4821.jpg" times fifty photos from a wedding or a vacation tells nobody anything, and you can't search or sort the folder by content. Renaming files one by one is meanwhile one of the most tedious things you can do on a computer. Finder has a built-in bulk rename feature that turns them all into a meaningful sequence at once — no downloads needed and no clicking through each file separately.

A typical scenario

You come back from a company event with two hundred photos named "IMG_4821.jpg" through "IMG_5020.jpg". You want to send them to a colleague who needs to find the photo from a specific moment — but names like that give them nothing to go on. Renaming every photo by hand would take an hour of tedious clicking.

Finder can rename selected files all at once following a pattern — say, "Company-Event-01.jpg" through "Company-Event-200.jpg" — and it's done in seconds. It works just as well in reverse: when you need to strip unwanted text a camera or scanner added to filenames, one pass with Replace Text mode handles it.

How to do it

1. In Finder, select the files you want to rename — Cmd + A selects everything in the current folder, or hold Cmd and click to select individual files.
2. Right-click any of the selected files and choose Rename….
3. In the panel that opens, pick one of three modes: Replace Text (finds and replaces a specific string across all names), Add Text (appends text to the start or end of the name), or Format (builds a new naming sequence with a number, date, or index).
4. With Format mode, choose a base name and numbering style — Finder shows a live preview of how the files will be named.
5. Check the preview in the list below the panel, and only then confirm with the Rename button.
6. If the result isn't right, undo it with Cmd + Z.
7. The feature works on folders too, not just individual files — handy when straightening out the naming across a whole set of project directories.

The best tools

• Finder's built-in bulk rename — handles ninety percent of everyday situations with nothing to install.
• Photos or Lightroom — if you're renaming photos right at import from the camera, these apps offer it as part of the import step.
• A Better Finder Rename — a third-party tool for advanced renaming patterns, if the built-in feature isn't enough.
• Shortcuts or Automator — for a recurring, more complex renaming scheme you want to trigger with a single click.
• Custom album naming on import in Photos — for photos from your phone or camera, you can set up meaningful naming right at the moment you import them onto your computer.

What you get out of it

• Time: renaming two hundred files by hand would take an hour; doing it in bulk is a matter of seconds.
• Clarity: files with a descriptive name and numbering are easy to sort and search, even months later.
• Less risk of mistakes: the preview before confirming shows the result before anything actually gets renamed.
• Better collaboration: colleagues who receive files with descriptive names can find their way around them without having to ask what each photo is.

Pro tip

Combine Format mode with a descriptive base name that includes a date or event name — the files then sort chronologically and alphabetically at the same time, and a year later you can still easily find your way around them.