Using a duplicate file finder for Mac is way more efficient than manually looking for duplicate files. To help you deal with the duplicate files on your Mac in the best possible way, this article talks in detail about two types of duplicate file finders.
Cisdem Duplicate Finder
Free Download macOS 10.11 or later
I tested most of the popular third party duplicate files finders available for macOS and picked 8 best ones. These apps can vary in features, ease of use, etc. For example, some apps support working with the Photos app, but some don’t. Let’s first look at a brief comparison of the 8 apps.
| Find duplicates | Remove duplicates | Support for Photos | Ease of Use | |
|---|---|---|---|---|
| Cisdem Duplicate Finder | Great | Great | Yes | Great |
| Gemini 2 | Great | Great | Yes | Good |
| Duplicate File Finder by Nektony | Great | Great | Yes | Good |
| Duplicate Detective | Good | Good | Yes | Great |
| Easy Duplicate Finder | Great | Great | No | Good |
| dupeGuru | Good | Good | No | Good |
| Disk Drill | Good | Good | No | Great |
| Duplicate Manager | Good | Good | No | Fair |
Below you can find the review of each app.
Compatibility: macOS 10.11 El Capitan or later
Latest version: 6.5.0, released in December 2023
Our take: Find all duplicate files on your Mac and help you remove them with a click
Cisdem Duplicate Finder is the best of its kind due to its outstanding performance and ease of use.
Using advanced algorithms, this app identifies duplicate files by content, regardless of filename. It finds duplicate photos, songs, videos, Word documents, PDFs, spreadsheets, presentations, archives and all other types duplicate files. It also finds similar photo files, letting you set the similarity level.
Supporting Mac and external storage devices, Cisdem Duplicate Finder can find duplicate files in and across folders or drives. It also supports scanning Photos, iPhoto, Music and iTunes for duplicates.
This app displays the found duplicate files for you to view. You can compare the duplicates side by side and view their details such as file size, path, and resolution. It automatically selects all duplicates for you to remove with a click. Or, you can decide which files to delete by choosing a selection rule (e.g. Select Oldest, Select Lowest Resolution, Select Largest) or selecting manually.
Compatibility: macOS 10.13 High Sierra or later
Latest version: 2.9.11, released in February 2024
Our take: A good-looking duplicate file finder for Mac with good performance.
Gemini 2 excels at finding different types of duplicate files. You can use the app to scan folders, the Photos app or the Music app on your Mac for duplicate archives, audio, documents, images, and videos. If you select the Scan for similar files option in Preferences, it will also find similar images and audios.
Compared to the best duplicate file finder Mac I described above, its scanning speed is slower. It requires you to keep Photos app open when searching for duplicates in the Pictures folder and keep iTunes open when searching in the Music folder. This tool is not friendly to users running older systems, such as my macOS 10.13. When it starts scanning, my computer becomes slow because it uses so many resources.
It has a simple and clean user interface, which makes users less irritated when dealing with a large number of cluttered duplicate files. After the scan is complete, it displays all the duplicate files in groups. But I found that sometimes it splits the same set of duplicate files into two groups. This usually happens when the duplicate files are scattered across different folders or subfolders. You can manually select unwanted duplicates for removal or let Gemini 2 do that for you. The removed files will go to Trash by default.
There is a Duplicates Monitor feature. Once enabled, this feature automatically detects new duplicate files in real time and notifies users of them. The feature can be helpful, but it uses lots of CPU.
Compatibility: macOS 10.13 High Sierra or later
Latest version: 8.2.5, released in July 2024
Our take: An easy-to-use app to find identical files and even similar photos
Duplicate File Finder by Nektony is an easy-to-use app to find duplicate pictures, videos, audios and more. In addition, it can find photos or audios that are very similar. Also, there is an optional feature to find duplicate folders.
There are three scan modes. You can use the default mode to scan one or multiple folders for duplicate files at a time. The two additional modes are dedicated to handling pictures and music respectively, but they do nothing more than automatically adding the Picture or Music folder for scanning.
The found duplicate files will be listed in a window. You can preview images and view file details such as name and size. It’d be better if it allowed you to preview a set of duplicate images side by side. In each set of duplicate files, you can manually select the redundant one(s) for removal. You can also use the Auto Select feature to automatically do the selection.
If you upgrade to Duplicate File Finder Pro, you will get an advanced "merge similar folders" feature, which can help you merge 2 folders that contain some identify files and combine the 2 folders into a new folder.
Compatibility: macOS 10.7 Lion or later
Latest version: 1.99.3, released in March 2022
Our take: A basic but useful duplicate file finder app that works on older Macs.
This Mac duplicate file finder and remover looks less sophisticated due to its simple and unpolished interface. It actually does a good job of scanning for and removing duplicate files on Mac. It can find duplicate files in and between folders. But the finding process will be slow if there are a large number of files. In addition, it can search for duplicate folders. But it lacks advanced features like similar file detection.
Although being basic, this app supports finding duplicates in Mac’s Photos app. However, in the test, it failed to find duplicate raw image files in Photos due to its lack of support for raw image formats.
Its duplicates preview feature is a bit average. Unlike most other Mac duplicate file finders, it doesn’t even show you a thumbnail of the file for a quick preview, only the file name. So it’s not perfect for people who want to eliminate a lot of duplicate photos.
It’s worth mentioning that by default this app ignores certain files (such as certain system files) when it scans for duplicate files. This helps keep your important files untouched.
Compatibility: macOS 10.6 Snow Leopard or later
Latest version: 7.27.1.56, released in June 2024
Our take: Easy to use and versatile, helping you find duplicate files on Mac, Google Drive and Dropbox.
(This app’ newer versions don’t support old macOS versions like macOS 10.6. Only its older versions do.)
You probably have heard about Easy Duplicate Finder. It’s a very well known duplicate finder for Mac and for Windows PC.
It provides over ten scan modes. To scan for duplicate files in computer folders, the default mode is recommended. The Music scan mode can be the choice is you only want to find duplicate songs. There are even two modes for Google Drive and Dropbox respectively.
However, there is no mode support for the Photos app. The fact is that duplicates in the Photos app are often the duplicate files that Mac users want to take care of most. Luckily, there’s a workaround. Some old versions (like version 5.25.0.1073) of Easy Duplicate Finder have a Photos scan mode.
To help uses efficiently select unwanted duplicates for elimination, this app offers a helpful set of selection rules.
Compatibility: macOS 10.12 Sierra or later
Latest version: 4.3.1, released in July 2022
Our take: A free and open-source duplicate file finder with fair performance and a rich set of options
Are you looking for the best free duplicate file finder Mac? dupeGuru can be the choice.
This freeware has three scan modes: Standard, Music and Picture. Each mode has different scan options. The Standard mode allows you to identify general duplicate files by content or name. Identifying by content can find duplicate files with different names. The Music mode is specialized in looking for duplicate audio files. You can set it to find duplicates by content, name or tag. Dedicated to working with image files, the Picture mode can help you find duplicate image files. There are a few options available for this mode. For example, you can set the Filter hardness. If the Filter hardness is less than 100, dupeGuru will also find similar pictures.
dupeGuru only supports scanning computer folders. It’s not a good idea to use it to find duplicates in other places (such as the Photos app) on your Mac.
This app doesn’t have a built-in preview pane. To view duplicate files, you can double-click on the file name to open it with the default program. Although there is a “Dupes Only” button in the results window, it doesn’t work. I click on it, but it marked nothing. So if you lots of duplicate files on your Mac, this free tool is not for you. It’s very time-consuming to view and manually check all duplicates one by one.
Compatibility: macOS 10.15.7 Catalina or later
Latest version: 5.4.1426, released in December 2023
Our take: A data recovery app that provides a tool to quickly find duplicate files in folders on a Mac.
Paid data recovery app Disk Drill has a bunch of extra tools, which are free. The Find Duplicates tool is one of them. Some other extra tools are S.M.A.R.T monitoring (which monitors the health of disks), and Clean Up (which analyzes disk space to help you optimize storage).
This free duplicate file finder tool can quickly search a folder on Mac for duplicates. It’s actually the fastest of all the tested apps. But note that it only supports working with folders.
Once the search is complete, you will be presented with the results window. There, you can view the file names, size, and locations of the found duplicates. And manually select the ones that you don’t want to keep. Also, you can let this tool to select newest/oldest file in each set of duplicates for you to remove. By default, the removed files will go to Trash.
If you happen to have Disk Drill installed on your Mac, you can check out the Find Duplicates tool. If not, it’s better to get a dedicated app, especially if you want to make the Photos app duplicate free.
Compatibility: macOS 10.8 Mountain Lion or later
Latest version: 1.4.4, released in January 2024
Our take: A fairly customizable app to scan for duplicate files Mac’s folders.
(An app called Shorui used to be on this list. However, Shorui is now not available for download. Therefore, I replace it with another app.)
As the name suggests, Duplicate Manager is an app dedicated to dealing with duplicate files.
This app can scan one or multiple folders on Mac for duplicate images, videos, documents and other common duplicate files. Although it also allows you to scan for duplicate files in the Photos app, it actually doesn’t properly support Photos. Deleting the duplicates items in Photos that found by this app is very likely to damage your Photos library, which should definitely be avoided.
Duplicate Manager is customizable, allowing you to control what duplicate files to scan for and how the scan works. For example, there are five different modes to compare files to identity duplicates. However, the interface is not that intuitive. Some settings and options are somewhat hidden.
You need to get the paid (or pro) version of this app to mass remove duplicates. Otherwise you need to remove duplicates one by one.
Compatibility: macOS 13 Ventura or later
Our take: Find duplicate photos and videos in the Photos app for free
The Photos app on macOS Ventura or macOS Sonoma has a built-in duplicate detection tool. It detects certain similar photos in addition to duplicate photos.
This duplicate detection tool is completely automatic and works in the background. You don’t need to start or turn on it. You can’t force it to start the detection immediately either.
There are some limits. This tool is only available in newer macOS versions. It only supports images and videos. It only works with files that exist in the Photos library. And there's a delay in the duplicate detection. It usually only finds duplicate photos I created months ago. The possible disadvantage is that there isn’t an option to mass remove duplicates. You need to deal with every set of duplicate files one by one.
Compatibility: All macOS versions
Our take: Find duplicates in Music or iTunes for free
Like the Photos app in newer macOS versions, the Music app on Mac also has a duplicate detection tool, which is called Show Duplicate Items. The same tool is also available in iTunes, which is replaced by Music since macOS Catalina.
This tool can quickly find duplicates and non-exact duplicates in Music or iTunes. It’s recommended to start with the former type. To ask this tool to find duplicates, press and hold the Option key and go to File > Library to choose Show Exact Duplicate Items. You need to manually delete the unwanted duplicates, which will take quite a while if there are tons of duplicates. To find non-exact duplicates, go to File > Library to choose Show Duplicate Items.
Note: macOS also provides a way to help users automatically search for duplicate files in a folder, which requires the use of the Terminal app. This method supports all common file types like images, audios and documents. However, this method requires command line knowledge and is very inefficient in removing duplicates. So this article doesn’t talk about it further.
What makes a good duplicate file finder for Mac?
How do I use a duplicate file finder on Mac?
Step 1. To find duplicate files in a location, add the location to scan.
Step 2: Some apps automatically ignore system files/folders from the scanning. If not, you can manually add them into the ignore list.
Step 3. Start the scan.
Step 4. When the scan is done, decide which duplicate files to delete. Or, let the app decide for you. It’s recommended to explore the selection feature if available, which helps quickly do the selection exactly based on your need.
Step 5. Remove unwanted duplicates. It’s recommended to move them to the Trash, which makes it easy to restore deleted files when needed.
Removing duplicate files can free up storage space, making room for new files and possibly making your Mac run faster. Also, it’s easier to manage files on a duplicate-free computer. The best duplicate file finder for Mac can help you effortlessly, effectively and safely root out duplicates from your Mac, no matter where they reside and how deep they hide. Which one is the best? Well, I hope going through the above listed candidates can help you easily answer the question.
With a passion for tech and writing, Sarah joined Cisdem, where she focuses on creating articles about using utility tools to enhance file management and simplify contact management.
EsbeInime
Cool, I've been looking for this one for a long time
A Random Guy
I'm happy with my old iMac in general, but it has little space left. I tried the app you recommended. It found tons of duplicate photos and other duplicates and freed up gigabytes of space. It's amazing.
brownclark
Having trouble with duplicate files? just use "DuplicateFilesDeleter program"
Gina
The duplicate file finder you recommend is only for Windows.
M. Razali
In so far tried Cisdem DuplicateFinder and giving it a 5*. Except I was using an unregistered version of the sofeware and thus I can't get it to delete the duplicates. Any chance of a discount coupon? :)
Vonnegut
5 out of 5 stars for this only program Cisdem DuplicateFinder. I used this duplicate file finder for years. Others are definitely not recommended.
Rosa Reyes
Hi, Vonnegut, thank you for the support of our product Cisdem DuplicateFinder. We will keep up the good work.
Helen Krieger
Downloaded the free trial, but though it will locate duplicates it won't let you delete the extra ones...so really the free trial is more of a preview I guess.
Rosa Reyes
Hi, Helen Krieger, free trial version of many duplicate file finder only allows you to find duplicate files; if you want to delete them, you have to buy.
natamolestr
Very well written! I will immediately seize your rss as I can’t find your e-mail subscription link or newsletter service. Do you’ve any? Kindly permit me recognize so that I may subscribe.
Rosa Reyes
You can subscribe by clicking "SUBSCRIBE" on the lowest right corner of the page and inputting your email address, then clicking "Subscribe".
gabapentinea
Regards our friends,
angelo
Try DuplicateFilesDeleter. Helped me few months ago.
pachy
where can I find a mac version?
kevinm.lee123@hotmail.com
Thank you for writing this useful article. I tried Cisdem DuplicateFinder, it really found all of the duplicate files on my Mac. It saved my hard disk storage.
Richard90
Cisdem DuplicateFinder is really the best solution. I used it to find duplicate files on my Mac, it did a good job. I like it. Thank you, writer.
Chris
Useful article, useful tool. I tried the first one as it seemed better than others. Actually, it did well.
Barbara123
Writer recommended so many duplicate finders, I tried the first one. It was great!!! Thank you!!!