Readdown
Double-click to read .md files, spacebar to preview in Finder. Native, free, with Mermaid and syntax highlighting.
MacDown 3000
A free, open source Markdown editor for macOS with live preview, syntax highlighting, GitHub Flavored Markdown, and Apple Silicon optimization.
MarkText
A free, open-source, real-time preview Markdown editor for macOS, Windows and Linux. Beautiful typography, 33 built-in themes, math, diagrams, footnotes — all rendered live.
MacMD Viewer
Read AI-Generated Markdown on Mac. Native Mac Markdown viewer with Mermaid, QuickLook in Finder, and live reload. Built for AI agent output (Claude, Cursor).
Marked
Marked is a native macOS app for live Markdown preview, proofreading, and export to PDF, HTML, DOCX, EPUB, and more.