Markout for MAC
Free, open-source native Markdown editor for Mac with live preview, math, Mermaid diagrams and HTML/PDF export, all working offline.
Markout Overview
Markout is a native Markdown editor for macOS, built as a spiritual successor to the no longer maintained MacDown. You write plain text on one side and see the rendered result on the other, with a live preview that follows your scrolling. The preview supports GitHub-Flavored Markdown, syntax-highlighted code, TeX math with KaTeX and diagrams with Mermaid, and everything runs offline: the rendering engines are built into the app, so your documents are never sent anywhere.
Markout is built with SwiftUI and is made by maxmilian. It is free and open source under the MIT license. Version 0.3.0 adds native window tabs, a welcome window with recent documents and its own recent-documents list. Markout needs macOS 14 or later; the developer recommends an Apple Silicon Mac. The app is ad-hoc signed but not notarized by Apple, so macOS shows a warning the first time: right-click Markout.app and choose Open, or clear the quarantine flag in Terminal with xattr -cr /Applications/Markout.app.
Key Features
Markout is a fast, native place to write Markdown.
- Live preview: split editor and preview with scroll sync.
- GitHub-Flavored Markdown: rendered with cmark-gfm.
- Math and diagrams: KaTeX formulas and Mermaid diagrams, offline.
- Code highlighting: in the editor and the preview.
- Export: standalone HTML or PDF that matches the preview.
- Themes: editor and preview themes plus your own CSS.
- Writing aids: list continuation, image paste, find and replace.
- Table of contents: insert it or browse it in a sidebar.
What’s New in Version 0.3.0
Markout 0.3.0 improves how documents open.
- Native window tabs: new documents join the existing tab group
- Welcome window with recent documents on launch
- Its own list of the 10 newest documents, with missing files dimmed
Markout FAQ
Is Markout free?
Yes. Markout is free and open source under the MIT license.
Which macOS version does Markout need?
Markout needs macOS 14 Sonoma or later.
Does Markout run on Apple Silicon?
Yes. The developer recommends an Apple Silicon Mac.
Does Markout work offline?
Yes. The syntax, math and diagram engines are built into the app, with no online service needed.
Can Markout show math and diagrams?
Yes. It renders TeX math with KaTeX, inline with $…$ and as display blocks with $$…$$, and diagrams with Mermaid.
Which formats can Markout export?
Standalone HTML with the CSS inlined, and PDF that matches the live preview.
Can I change how the preview looks?
Yes. Choose between preview themes or add your own custom CSS. Light and dark mode follow the system.
Why does macOS warn me when I open Markout?
Markout is ad-hoc signed but not notarized by Apple. The first time, right-click Markout.app and choose Open. If it still will not open, run xattr -cr /Applications/Markout.app in Terminal once.
Can I install Markout with Homebrew?
Yes. Run brew install --cask maxmilian/tap/markout. Then you can open files from Terminal with markout file.md.
Where does the Markout download on markout.FULLMAC.app come from?
The download button leads to the official Markout releases on GitHub at https://github.com/maxmilian/markout/releases/latest. markout.FULLMAC.app does not change or repackage the app.
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FULLMAC.app does not host this app. Download buttons lead to the developer’s own pages.