Markdown Prism is a fast, lightweight macOS-native Markdown editor and viewer designed for a seamless writing experience. It offers real-time side-by-side live preview with smooth debouncing, ensuring instant visual feedback as you type. The application is equipped with robust rendering capabilities, including high-quality LaTeX math via KaTeX and complex diagrams through Mermaid.js, alongside syntax highlighting for over 180 languages via highlight.js. Built for developers and writers, Markdown Prism also features QuickLook support for instant file previews in Finder, offline functionality, and automatic file watching to detect external changes, all while leveraging the native macOS text engine for smooth typing and standard system integrations.