Download of dff2dsf 1.6 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The actual developer of this free Mac application is 2manyrobots.
The following version: 1.2 is the most frequently downloaded one by the program users. The most frequent installer filename for the program is: dff2dsf.dmg. Dff2dsf was developed to work on Mac OS X 10.6 or later. The application is included in Audio & Video Tools.
From the developer:
dff2dsf is an application used to convert .dff audio files, which cannot be tagged, to .dsf files which can be tagged. Note that there is no loss of quality in the conversion process: the conversion is a repackaging not a re-encoding.
You may want to check out more software for Mac, such as ImTOO iPhone Video Converter, ImTOO DVD to iPhone Converter or StreamRipperX, which might be related to dff2dsf.