---
title: "How to find and remove duplicate files on a Mac - PaneStack"
description: "How to find duplicate files on a Mac by their contents, and look-alike photos such as bursts and HEIC/JPEG pairs, then clear them safely with PaneStack."
canonical: https://panestack.app/find-duplicate-files-mac.html
---

# How to find and remove duplicate files on a Mac

Finder can't find duplicate files. PaneStack can: choose **Go › Find Duplicates Here…**, and it lists every set of identical files in the folder, biggest waste first, ready to clear in one click. Everything it moves to the Trash can be undone.

## In Finder

There's no duplicate finder in Finder. You can sort a folder by name or size and compare files by eye, which misses copies with different names and takes a long time.

## In PaneStack

1. Open the folder, or select one, and choose **Go › Find Duplicates Here…** (or right-click › Reorganise › Find Duplicates…).
2. PaneStack lists groups of identical files, the ones wasting the most space first.
3. The oldest copy in each group is kept by default. Choose **Keep Newest** instead if you like, or tick and untick files yourself.
4. Press **Move Marked to Trash**. Changed your mind? **⌘Z** brings them back.

## How it knows they're identical

PaneStack compares contents, not names. It checks sizes first, then the start and end of each file, and only then the whole file, with a SHA-256 fingerprint. So two files are only called duplicates when every byte matches, and big folders are checked quickly. Hard links to the same file aren't counted as duplicates.

## Look-alike photos

Bursts, edited copies and HEIC/JPEG pairs aren't byte-for-byte identical, but you rarely need them all. Choose **Go › Find Look-alike Photos Here…** and PaneStack groups photos that look the same. **Keep the Best** marks every copy except the sharpest, largest one, and you check them before anything moves.

## Common questions

### Does macOS have a duplicate file finder?

No. Finder can't find duplicates. PaneStack finds them by contents with Go › Find Duplicates Here….

### Is it safe to delete duplicate files on Mac?

With PaneStack, yes: only files whose contents match exactly are grouped, one copy is always kept, and anything moved to the Trash can be undone with ⌘Z.

## Try PaneStack

PaneStack is a Finder alternative for Mac with up to 16 panes and undo for everything. One purchase, from $4.99, with every future version included. [See pricing](https://panestack.app/#pricing) or read [more tips](https://panestack.app/tips.html).