Preview selected Markdown from any app in a lightweight floating popover.
A minimalist local menu bar app. No internet required.

brew tap Liooo/tap
brew install --cask glance-md

# If macOS blocks the app as an unidentified developer, remove quarantine after install:
xattr -dr com.apple.quarantine /Applications/GlanceMD.app

• For a quick preview, it's been overkill to copy the text, switch to a preview app or browser, paste it, then switch back to the original app.
• Wanted one handy reliable place to preview Markdown from anywhere on the machine.
• Wanted to be freed from waiting for another app to support Markdown rendering.

• keyword searching
• best-effort parsing for tables wrapped in narrow windows
• Mermaid.js rendering
• light/dark mode

Some apps do not expose the current text selection through the macOS Accessibility API. As a workaround, cmd+c copy then hit clipboard preview hotkey.