Duplicate Detective: Find & Delete Duplicate Files


Click on "Download Now" button under Icon to download this content for Free


AWARDED MACWORLD 'MAC GEM' - The Best Duplicate Finder For Mac!

Duplicate Detective is the most comprehensive duplicate finder for your Mac. It quickly scans your hard drive to find all the duplicate files and folders on your Mac. You can then selectively choose which duplicates to delete and consequently free up precious space on your hard drive.

• Intuitive and easy to navigate
• Retina-ready graphics
• Scan individual or multiple folders in one go
• Drag and drop support to add folders before scanning

• Files compared via our advanced SHA-1 hash checksum algorithm
• Super fast and accurate duplicate detection algorithms
• Locate duplicate images, audio, archives, entire folders and more
• Support for Photos and iPhoto Libraries
• Support for external hard drives and network volumes
• Blacklist certain folders to ensure they are never scanned

• Filter and sort duplicates depending on their type/size/name/age, etc
• Quick Look support by hitting the spacebar over any duplicate file/folder
• One-click auto selection/deselection of all duplicates for your ease
• Double-check verification screen before deleting duplicates
• Option to enable alias creation to replace duplicates with shortcuts
• By default, duplicates are moved to your Trash, allowing for easy and safe recovery

We've worked hard to make Duplicate Detective as simple and efficient as possible for you to use. We would love to hear your thoughts via email and make any improvements to future versions of this app. We intend to have an active development cycle powered by your feedback and support!!


What's new in Version 1.98

- Added support for Touch Bar
- User interface improvements
- Improved auto selection controls

If you're a fan of Duplicate Detective, be sure to check out our new 6-in-1 flagship utility app, Disk Aid.

Please kindly leave us an updated review. We read each and every comment and your encouragement keeps us motivated to continually find ways to improve the app. If you have a suggestion, please message us through:



OS X Screenshot
OS X Screenshot
OS X Screenshot
OS X Screenshot

Customer Reviews

Generally good, noticed one (minor) bug

Like past reviewers have said, it tends to take a while to scan a folder. I had to leave it running overnight to get it to finish its scan. But the scan seems to get all the duplicate files and will group them by folder if all the contained files are the same (which is a really nice feature).

One bug that should be fixed in future versions: On the results page when you are selecting the files that you want to delete, the estimated size that will be made available isn’t accurate. You can recreate this bug by just toggling the checkboxes on a few items and seeing how the estimated size jumps around. For me, toggling a ~10MB file results in the estimated size jumping around by over 100GB. My scan found 100s of GBs of duplicates so I don’t know if this bug just presents itself for really big scans or it shows up in smaller scans too. The bug doesn’t really affect how well the app does its job of removing duplicates but it would be nice to have an accurate estimate of how much space would be saved.

Just OK

I have so many pictures all over my hard drive and external hard drive. I wanted an app that would find the duplicates. Yes, it found duplicates, but not all. Once it scanned, which it took forever by the way, it would come up with some duplicates. I could take the file name that it found and put it into my Finder window and found a ton more. Too time consuming to delete them like that. It will also tell me that there is one in my Photo app and when I go to search for it, it’s gone. Or it will tell me there is one in the Photo app and one in a file folder. So I thought I’d delete the one that was showing in the folder, saving the one in the Photo app. Well it ended up deleting them both. I did NOT have them both checked, but it still deleted them both. :( Anyway … all that aside, just make sure when you hit delete that you aren’t deleting something you want to keep. :(

Going to look for another app ….


I always drop my MAC HD onto it whenever I want to find all duplicaates, and boy does it do an excellent job. When I first started, it took forever and ever, it seemed, but the little emessages pop up and say be patient we are not finished yet, we will tell you when we are done. and yes it does. This app has freed up so much space on. my computer. Now when I run it, it maybe finds a ½ a dozen duplicates all the time. Once you use it to the full extent to find all your duplicares, it will make sure your computer has no more in it when you run it the net time. I give this app a 5 star because it has really freed up my computer and helped me find all the duplicaates inon my HD. I love it. use it regularly and would recommend it to anybody using a wonderful MAC.


Customers Also Bought

Duplicate Detective: Find & Delete Duplicate Files
Download for Free 2 Archived versions available

This app is designed for OS X
  • Mac App Store Price: $4.99
  • Category: Utilities (Mac)
  • Updated: Nov 18, 2016
  • Version: 1.98
  • Size: 4.1 MB
  • Language: English
  • Seller: FIPLAB Ltd
Rated 4+

Requirements: OS X 10.7 or later, 64-bit processor

Customer Ratings

Current AppAddict Version:
Current Mac App Store Version:
All Mac App Store Versions:
Follow AppAddict on Twitter and like it on Facebook
Tweet Share on Facebook