How to Find and Delete Duplicate Files on Mac?

2017-02-16 03:17:07 / Posted by Rosa Reyes to Utility Follow @ Rosa

Do you feel the speed of your mac get slower and slower? It can be caused by many reasons, such as the aged system, much trash, many application etc. Even we clean up the trash regularly, but there are still much trash hided in the system or not be in the trash bin that we do not clean. Here I want to share my way that use a mac duplicate file finder to find and delete duplicate files.

Why so many duplicate files on mac?

Your startup disk is almost full, everyone must have seen this annoying hint when we download or save files. By now, find and delete duplicate files are our first choice. But why are there so many duplicate files on mac? All of them come from two ways:

  • One is generated by the system itself.
  1. Installed programs
  2. System protects you
  3. Installed applications

The Duplicate files generated by those way are with legitimate reason, so most of them cannot be deleted, if you do not know what exact they do. If you delete these useful duplicate files by mistake, the mac or application will cannot be operated successfully.

  •  Another is generated by ourselves
  1. After combine mac files with external drives files
  2. The photos taken with burst mode
  3. Same picture download several times
  4. Same files exist in different disks

In this way, most of duplicate files are useless and can be deleted. But how to find and delete duplicate files on mac what in different depth and folders?

How to find duplicate files on mac?

Duplicate files can be everywhere, so it will be a waste time and energy thing if we find them by our eyes. Here, I will recommend several third applications to help us find and delete duplicate files.

Free Download

Cisdem DuplicateFinder for mac provides free version, we can try it before we buy. Also after buy it, it also has 30 days money back guarantee.

  • Scan folder(s) or external hard drives

Run the app and drag the folder(s) you want to scan to the interface then click scan. Of course, it also support scan external hard drives, just connect them and choose the folder(s) you want to scan.

  • Overview what kinds of duplicate files

After scan, there will be 7 categories (Documents, Images, Music, Videos, Archives, Packages and Others) with both pie chart and tab view in the result page. In this interface, you can  know the exact storage and location of them easily.

After find the duplicate files, keep or delete? That is a question. So how to delete duplicate files on mac?

How to delete duplicate files on mac

After find duplicate files, the most excited thing is delete them. But think twice about deleting duplicate files, after all the god will not give one more chance to recover the files that deleted forever.

Think before you act about deleting duplicate files! Delete the useless duplicate files is a great way to free up space for your mac. But you will be in trouble if the files deleted that they are useful in the future. It will be so regretful.

Before delete duplicate files on mac, Cisdem DuplicateFinder provides safeguards for file deletion you can overview them and unselect what you want to keep. If you are sure they are useless. Click delete, let them go to hell.

When delete the duplicate files, you can decide whether delete completely, move to folder or just remove them to trash. In the setting window, you decide where the duplicate files will go.

Tips on how to reduce duplicate files on mac

The computer becomes more important in our daily life and work. We look through, download and create many files everyday, so avoid duplicate files thoroughly is impossible. In this certain, reduce duplicate files can be a great way to free up our computer. Following are some ways I used to reduce duplicate files.

  1. Delete all the application data after uninstall app
  2. Classify the files on my mac
  3. Delete useless transcript in time
  4. Clear up the trash regularly
  5. Tidy your folders regularly
  6. Delete duplicate photos, music and blurry photos regularly

    Caution:  Before delete every files, ask yourself three questions.

    • What they will do?
    • Does it have any useful information?
    • Do you really not want them?


Video about how to find and delete duplicate files on mac with Cisdem DuplicateFinder for mac.

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