RawConvertor 3.9 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
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. The software lies within Audio & Video Tools, more precisely Editors & Converters. This free Mac application is an intellectual property of Nikolaj Pogněrebko.
From the developer:
Raw Convertor provides batch conversion of RAW video files, from ProRes RAW format into a CinemaDNG reel including audio and timecode. The output compression method can be selected between an uncompressed 16-bit format and a lossy compression of various compression levels.
You may want to check out more Mac applications, such as RAW Converter Pro, which might be similar to RawConvertor.