What is the best duplicate finder for mac

Discussion in 'Mac Apps and Mac App Store' started by Anarchy99, Dec 28, 2013.

  1. Anarchy99 macrumors 6502a

    Dec 13, 2003
    I have several external hard drives I normally keep as a data drives where i throw anything and don't really have much of a organizational system
    throughout the years I've probably piled up a lot of duplicate files eg. same/similar MP3 files duplicate pictures, movies etc. from old backups
    What is the best software for automatically getting rid of some of the duplicates etc. and perhaps assisting in organizing so this doesn't happen again

    Most the file duplicate finders Ive seen look for other similar names or every file of a certain size but I know softwares on the market like shazam & midomi etc. prove audio should be detectable and I know there's such thing as image recognition so is there a smarter way of finding these similar files rather than just relying on size or name?

    As always I prefer free but I'm willing to spend money if the quality of software is worth it

  2. flynz4 macrumors 68040

    Aug 9, 2009
    Portland, OR
    As long as you do not have a common "home" for your data... you will continue to have a disorganized mess. No software will rid you of that.

    You need a single place to keep your data (or at least categories of data). Then make sure that any data (of that category) is always put there. That way, everything else is just a copy, and can be deleted.

    My best advice is to use specific tools for specific types of data. Examples:

    Aperture/iPhoto for pictures. Insert everything... and then organize there... deleting dupes as you organize. Import using the "do not import duplicates" option... that might remove a lot during import.

    iTunes or similar as a music database.

    DevonThink or similar as a document database.

    As soon as you start this... make sure that the single "home" for your data is well backed up. I would recommend at least two different backup mechanisms... one local, one remote. My recommendation is Time Machine and Crashplan. Also... making a clone can come in handy as well. I use CCC.

  3. balamw Moderator


    Staff Member

    Aug 16, 2005
    New England
    I have found dupeguru to be quite good, and it has modes/versions specific to music and pictures, unfortunately the developer has decided to not continue development.

  4. ozaz macrumors 65816

    Feb 27, 2011
    Which ones have you ruled out based on this behaviour?

    I use Gemini which I'm happy with. It certainly looks beyond file name, although I don't know if it goes any deeper than file properties and metadata.
  5. Dark Dragoon macrumors 6502a

    Dark Dragoon

    Jul 28, 2006
    If you want to find similar but not necessarily exactly the same images then PhotoSweeper has worked well for me.

    For finding files which are identical I use Gemini.

    As far as I'm aware Gemini calculates the checksum of each files contents (might be SHA-1) then compares the checksums for duplicates.
  6. steve23094 macrumors 68020


    Apr 23, 2013
  7. Ulenspiegel macrumors 68030


    Nov 8, 2014
    Land of Flanders and Elsewhere
  8. Basilfawltyone macrumors regular

    Sep 2, 2013
    Chicago, IL
    I just bought DevonThink to go paperless. One of the neat functions is the duplicate finder! I didn't know that when I got Devonthink but it works great.

    They even have something called replicas, a kind of duplicate that really is an original and that changes accordingly when you do a change in any of the files.

    I imported all my pdf, doc, pages, emails etc in to the Devonthink app and indentified 17.000 duplicates!

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