A focused, native Markdown editor for the Mac.
Side-by-side live preview, an outline built from your headings, native Mermaid diagrams drawn in pure Swift, and one-click HTML and PDF export. No Electron, no web wrapper, no subscription, no account. Sandboxed and offline by design — your documents stay on your Mac.
Features
Write
- Side-by-side editor and live preview
- Formatting toolbar and matching menu commands: bold, italic, strikethrough, inline code, links, headings 1–6, bulleted / numbered / task lists, blockquotes, and code blocks
- Standard Mac keyboard shortcuts — ⌘B, ⌘I, ⇧⌘X, ⇧⌘C, ⌘K, ⌥⌘1…6, ⇧⌘7, ⇧⌘8, ⇧⌘L
- Full, unlimited undo and redo
Preview
- GitHub-flavored Markdown rendering — tables, task lists, fenced code blocks, blockquotes
- Mermaid diagrams rendered natively — flowcharts, sequence diagrams, pie charts, architecture diagrams — drawn in pure Swift, with no web view, no JavaScript engine, and no network access
- Resize each diagram (50–125%) or collapse it from its header bar
- Preview updates live as you type, in light and dark mode
Navigate
- Outline sidebar built automatically from your document's headings
- Click any heading to jump to it in both the editor and the preview
- Show and hide the sidebar with ⌃⌘S
Export
- Export to clean, self-contained HTML
- Export to PDF
Native
- Light, Dark, or System appearance — the editor, preview, and diagrams all follow
- Real macOS documents — auto-save, version history, and Revert To
- Document tabs (turn on "Prefer tabs" in System Settings)
- Open Recent, plus drag-and-drop a file onto the icon or a window
- App Sandbox, no network access
- Liquid Glass app icon on macOS 26 Tahoe
Requirements
macOS 14 (Sonoma) or later. Apple Silicon or Intel.
Privacy
MaiD does not collect, store, or transmit any data. It has no network access; all documents stay on your device. See the privacy policy for details.
Support
Bug reports, feature requests, and questions: support@australware.io, or see the support page. When reporting a bug, please include your macOS version, the MaiD version (MaiD ▸ About MaiD), and steps to reproduce.