The first developer beta of macOS 27.3 introduces native Markdown rendering within Quick Look. Developers and power users can now preview .md files directly in Finder by pressing the Space bar, which renders styled headings, bold text, lists, and links without requiring third-party extensions or external editors. This update continues Apple's integration of Markdown across its platforms, following recent additions to Notes and Siri AI app skills.
Source: https://www.macrumors.com/2026/11/04/macos-27-3-makes-markdown-files-easier-to-read/
