MultiMarkdown Composer is an open-source Markdown editor developed specifically for macOS. It has an intuitive, minimalist user interface that allows you to focus on writing in Markdown syntax. Some key features include:
If you're looking for a way to write in Markdown and easily convert it to other formats on your Mac, MultiMarkdown Composer provides a nice balance of features that writers need without too much bloat. As an open-source project, it benefits from an active community continuing development on it.