acousticbrainz-gui 0.1 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. We recommend checking the downloaded files with any free antivirus. The actual developer of this free Mac application is AcousticBrainz. The application lies within Audio & Video Tools, more precisely Editors & Converters.
From the developer:
This is one of the two clients (graphical and command-line) available for people to use to submit audio features to the AcousticBrainz database. These clients calculate a JSON file containing data about the audio and upload it to AcousticBrainz. To submit audio to AcousticBrainz, files must be tagged with MusicBrainz Identifiers
You may want to check out more Mac applications, such as VCode, MFilter or Aiseesoft WMV Converter for Mac, which might be similar to acousticbrainz-gui.