MacDown

MacDown is an open‑source Markdown editor built specifically for macOS and distributed under the MIT License. It provides a live preview pane that renders Markdown as you type, allowing users to see formatted output instantly. The editor supports syntax highlighting for fenced code blocks and offers sophisticated auto‑completion to speed up markup entry.

The interface and core behavior are modeled after the earlier Mou editor, preserving familiar shortcuts and layout while introducing improvements where the developer deemed necessary. Users can customize the rendering style, adjusting themes and CSS to match personal preferences or project requirements.

Targeted at writers, developers, and anyone who works with plain‑text markup on macOS, MacDown delivers a stable, feature‑rich environment for creating and editing Markdown documents without the need for proprietary software.