File Duplicates

i use a program called singlemizer from the app store. you can also get it from macupdate.com seems to do the trick for me fairly well.

Use DupeGuru or Find Duplicate Files or Decloner to scan for and delete duplicate files.

There are many applications listed in this thread that could be used.
I use CleanGenius Pro.

The Mercurian said:

Also looking for an app to identify duplicates ...I have multiple copies of files, mostly pdf's and mostly with differeing filenames.

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Those don't sound like duplicates that a program could find, unless there's a program that can read pdfs and determine that two are identical. But, if there is even a slight difference in content, could such a program flag a file as a "duplicate"? I'm thinking that filenames that are the same would be the identifier. Of course, you could have a copy of a file in a different place that had a change made to it that the "original" file did not have made to it. Then you'd have the same filename for two files that are not truly duplicates. Sounds like a major headache to me. I'd be really interested in learning how the programs suggested work, just for the knowledge base; I've no reason to use one at this time.