About this tool

Your AI writes Markdown all day. Your Mac still opens .md files in TextEdit, as raw text. MacMD Viewer is the missing piece: press Space in Finder and any Markdown file renders in Quick Look, or double-click to open it like a PDF. Live reload, Mermaid diagrams, syntax highlighting, document outline, native tabs, 12 document themes. Read-only on purpose: you keep the editor you already like, this handles the read side. Native SwiftUI, notarized, works offline. $19.99 one-time, no subscription and no trial.