Install MacMD Viewer — a native SwiftUI Markdown viewer for macOS — via Homebrew.
brew install --cask macmdviewer/tap/macmd-viewerThat's it. The cask downloads the signed and notarized DMG from the public release on GitHub, drags MacMD Viewer into /Applications, and registers the bundled QuickLook extension.
After install, auto-updates are handled by Sparkle — no need to run brew upgrade for new versions.
- QuickLook for
.md— press Space in Finder on any Markdown file, see it rendered instantly. - Mermaid diagrams — flowcharts, sequence diagrams, Gantt, ER, mindmap.
- GitHub Flavored Markdown — tables, task lists, fenced code blocks, footnotes.
- Syntax highlighting — 180+ languages.
- LaTeX math — KaTeX rendering.
- File watcher — auto-reloads when your editor saves the file.
- Read-only by design — pairs with whatever editor you use (Cursor, VS Code, Vim, Obsidian).
- 2 MB on disk, ~30 MB RAM, Apple Silicon native — no Electron, no Chromium.
$19.99 one-time. No subscription. License key activated in-app after first launch. See macmdviewer.com for the purchase flow.
brew uninstall --cask macmd-viewerUse --zap to also remove caches and preferences:
brew uninstall --cask --zap macmd-viewerReport cask issues here: https://github.com/macmdviewer/homebrew-tap/issues Report app issues at: mailto:support@macmdviewer.com
Cask formula: MIT. App itself: proprietary, see macmdviewer.com/terms.