Duplicate Detective 1.99.3 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This software for Mac OS X is an intellectual property of FIPLAB Ltd.
From the developer:
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 free up precious space on your hard drive.
You may want to check out more Mac applications, such as Duplicate Detector, Duplicate Annihilator for Photos or Duplicate Cleaner, which might be similar to Duplicate Detective.
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