MacDown 3000

MacDown 3000 is a free, open‑source Markdown editor for macOS that provides a live HTML preview while you type. It renders Markdown using the Hoedown library, supporting fenced code blocks, GitHub‑Flavored extensions, and configurable rendering options through its Preferences pane. Code snippets are highlighted with Prism, and the editor includes additional tools for rendering mathematical notation, task lists, and Jekyll front‑matter.

The application is built as a universal binary, running on macOS 11.0 (Big Sur) and newer on both Apple Silicon and Intel hardware. It can be installed directly from the website or via Homebrew Cask, and the package size is about 7 MB. The interface is lightweight, focusing on simplicity and responsiveness for users who need a straightforward writing environment.

MacDown 3000 continues the lineage of earlier macOS Markdown editors, emphasizing regular stable releases, bug fixes, and compatibility with modern Markdown styling. It is intended for developers, writers, and anyone who works with Markdown on a Mac and wants an editor that offers live preview, syntax highlighting, and extensible rendering without unnecessary overhead.