Apple has added built-in Markdown previews to Quick Look in the first developer beta of macOS 27.3. Users can select an .md file in Finder and press the Space bar to open a formatted preview. The change arrived in the first developer beta of macOS 27.3, as first reported by MacRumors.
Finder can now display common Markdown formatting
The Finder preview renders Markdown syntax instead of showing only the underlying plain-text characters. It supports headings, bold text, lists, and hyperlinks, giving users a readable version of a document before they open it in another app.
- Headings appear as formatted section titles.
- Bold text and lists render in their intended layout.
- Hyperlinks appear in the preview.
The capability is built into the operating system. People viewing documentation, project readme files, notes, or other .md documents do not need to install a Markdown editor or a third-party Quick Look extension simply to inspect the formatting.
Apple is building Markdown into more of its software
The addition follows Apple’s broader adoption of the lightweight text format across its platforms. Notes gained Markdown import and export in iOS 26, while iOS 27 added support for copying and pasting between Markdown and formatted text.
Markdown also has a role in Apple’s developer-facing AI work. Siri app skills can include SKILL.md files, which describe app actions. A native preview in Finder could make those files and other text-based project materials faster to review, particularly for developers who work across Apple’s desktop and mobile tools.
The feature matters because Markdown often sits between plain text and polished documentation. Finder’s preview tool is commonly used for a quick inspection of files, and formatted rendering removes a small but recurring step for users who handle documentation repositories, technical notes, and app configuration materials. It also gives macOS a basic capability that previously depended on a dedicated app or add-on.
Apple has not provided a final public release date for macOS 27.3. The available details also do not say whether the preview will later support Markdown elements beyond headings, bold text, lists, and links.
This article was produced with AI assistance from multi-source reporting and is published under our editorial standards.
