Downloading DictBuilder 2.1.3 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. DictBuilder.zip is the common file name to indicate this application's installer.
The most popular versions of the tool are 2.1 and 2.0. 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. You can install this free app on Mac OS X 10.6 or later. The application lies within Education Tools, more precisely Languages. This free Mac app was originally produced by TranslateIt!.
From the developer:
Unpack/pack dictionary tool, it supports the following dictionaries formats: DSL IPA Transcription, XDXF, TI/StarDict, TI/Folder Struct; Core (Perl) requires HFS . Designed for using with TranslateIt! Deluxe.
It is easy to use and also has a friendly interface.
You may want to check out more software for Mac, such as Just Translate, iLingual or Lexicon, which might be related to DictBuilder.