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MiaoYan vs MacMD Viewer: catalog facts
MiaoYan	MacMD Viewer
Free Free to download from the GitHub releases page.	Paid One-time purchase of $19.99 with a 14-day money-back guarantee.
macOS, iOS	macOS
Native Swift app, not Electron Notes stay as plain Markdown files in your own folder	Quick Look previews of Markdown in Finder Renders Mermaid diagrams and tables
macOS only No WYSIWYG editing mode	A viewer only, not an editor Requires macOS 14 or later
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.