Svitlana Shapovalova
Content marketer
August 16, 2021
12 minutes to read

A sad but true reality is that the performance of your Mac declines with time. One of the main reasons for a slow Mac is the congestion of useless files, such as caches, duplicates or other junk files. In our previous articles, we told about duplicates in Dropbox as well as several methods of deletion. In this post, we want to highlight two ways to remove duplicate video files from your Mac.


Delete duplicate video files manually

If you run El Capitan OS X and later, you can employ the advanced features of Finder to find duplicate videos on a Mac. For this, take the following steps:

  1. Open Finder.
  2. In the menu bar, click on File → select New Smart Folder from the pop-up menu.
  3. New Smart Folder menu command

  4. In the window that appears, click on the Add button (+) in the top right corner, below the search bar.
  5. New Smart Folder options window

    In the next moment, you will see that an additional field appears. Within this field, you can enter the search criteria. Since we are looking for duplicate video files, click on the left field and select Kind from the pop-up menu. Click on the right field and select Movie from the menu that appears.

  6. Then you will see a list of videos that are stored on your disk. You can sort them by name, kind and date last opened.
    New Smart Folder that shows videos

    Here you can find files with the same name and remove them. You can sort the items by date and try to find duplicate video files that have similar names. At any rate, you will have to step by step skim all your files to get rid of unneeded copies by removing them to Trash.

  7. Move to Trash popup menu command

  8. Then, empty the Trash bin to permanently delete duplicate files from your Mac.

Unfortunately, the manual method takes time and may not fully meet your needs. Duplicate files may have different names, so you may be confused if you have a habit of renaming copies of files. Therefore, we recommend using a special tool, which detects duplicates regardless of their names. In the next section we will tell you about a program that will delete duplicate files from your Mac quickly and accurately.

Delete duplicate files automatically

To quickly find and delete duplicate videos, use a special duplicate video finder from Nektony, called Duplicate File Finder. This application allows you to automatically find duplicate files and folders and remove them.

Duplicate File Finder scans your Mac and finds copies of items based on three main characteristics: size, extension type, and binary data. The Duplicate File Finder app has a user-friendly interface, and you can quickly detect and delete all duplicate files. If you want to get rid of unneeded video replicas from your Mac using Duplicate File Finder, complete the following steps:

  1. Launch Duplicate File Finder.
  2. You can select your Home folder for a fast start. Or you can click on the Add button (+) to add those folders, where your videos are mainly stored and click to Scan (▷).
  3. Duplicate File Finder window with folders selected for scan

  4. In the next moment, you will see results displayed in an interactive pie chart. You can select the Movies sector and review the video replicas. Or click Duplicate Files in the menu bar of the app and select Movies from the pop-up menu.
  5. Duplicate File Finder scan result window

  6. Here you will see a list of identical video files, based on the complex criteria of the Duplicate File Finder. You may notice that these files will have the same extension type and size. They likely have different names, but their binary data is identical. You can select each of the duplicates, click on the magnifier to reveal this file in Finder, then play and watch the video to decide whether you need it or not.
  7. Duplicate File Finder window showing Movies section

  8. Next, individually select the checkboxes of those files you want to remove. Or you can click on the Auto Select button and the app will automatically choose the useless copies.
  9. Duplicate File Finder window showing Movies section with copies selected for removal

  10. In the case with the Auto Select option, you will be asked to customize this feature. You can set up in Preferences which files to add to the Select Always list, and which ones add to the Never Select list.
  11. Duplicate File Finder window offers to customize Auto Select option

  12. Then, click on the Review & Remove button to skim the items you are going to delete to the Trash bin. Confirm the deletion of these items by clicking on the Remove button.
  13. Duplicate File Finder confirmation window to remove selected duplicates

  14. In the next moment, you will see a list of items you have just deleted. If you have changed your mind about deleting some files, you can restore them using the Removal History option. Just tick the items and click to Restore.
  15. Duplicate File Finder - Removal History window

  16. And finally, do not forget to empty your Trash bin to permanently delete duplicate video files from your Mac.

As shown above, Duplicate File Finder is able to find identical files by comparing them byte-to-byte, which is much more efficient than searching for duplicate videos manually. Even more helpful, Duplicate File Finder finds not only duplicate videos, but it also detects all other types of files:

  • Documents
  • Photos
  • Music
  • Archives
  • Folders

Thanks to these extra features, you can easily and quickly search and remove duplicates of any file type from your Mac.



Duplicate files may often appear on your Mac as a result of a daily routine, occasionally made copies or by downloading certain files several times. Duplicate files, especially big duplicate videos, clutter the storage space on your disk and make your Mac’s performance slow. Therefore, we advise regularly searching for unwanted duplicates on your disk and removing them.

Thanks to the Duplicate File Finder, you can easily and quickly find and delete any duplicate file from your Mac.

You can download Duplicate file Finder and use it for free to find and remove duplicates. The Pro version for $9.99 will unlock more features, such as merging folders, finding similar photos, and selecting duplicates in particular folders. Read about all benefits of Duplicate File Finder in our previous post.

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