As much as we love feature-packed applications that perform countless tasks, there?s nothing wrong with an inexpensive utility that does the one thing we need without much fuss and bother. Such is Fiplab?s $5 (currently on sale for $3) Duplicate Detective (Mac App Store link). As its name implies, it exists to locate duplicate files on your Mac and then, if you wish, fling them into the Trash.
Duplicate Detective does its work in a simple way. Just launch the application, and then drag a folder or volume into the utility?s window. Duplicate Detective scans that folder or volume, and then lets you know how many duplicates it finds. What it's specifically looking for are exact duplicates by comparing each file?s hash strings. If the strings match up, you have a duplicate; if they don?t?if one file is a PNG version of an image and the other a JPEG?the files are not included in the duplicate tally.
If you have a lot of files?say, hundreds of thousands, as could easily be the case with a large hard drive?this can take a very long time. If you?d like a faster result, scan a folder rather than an entire volume. (In a nice touch, when performing lengthy scans, the application displays humorous messages along the lines of ?So, how?s your day going?? to let you know that it hasn?t locked up.)
When the job?s done, you?ll see the number of files scanned, the duplicate count, and the amount of storage space the superfluous files consume (thus giving you an idea of the amount of space you?ll save if you delete the duplicates).
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