OFFICIAL PAGE: Stemverter 2
Stemverter 2 is an easy to use Mac application for separating stems from an audio file. The AI-powered application will separate your mp3, m4a, aiff, wav, and flac source material into 2, 4, or 5 stems. Stemverter 2 is a free upgrade for users of Stemverter 1.1. Full details at the official page.
Screenshot courtesy of cflo inc.