Goal Open individual .md files on macOS in a rendered preview, without a vault (ruling out Obsidian) and without showing the editor pane. Tool: MacDown 3000 MacDown 3000 is an actively maintained MIT-licensed fork of the abandoned MacDown project. Install via Homebrew: bashbrew install --cask macdown-3000 Key features relevant here:
Split editor + live preview pane Editor pane can be hidden with Cmd+Shift+E