Markboard is an Atom package for Mac OS X that copies Markdown to the system clipboard as formatted text. When working in a Markdown view, press
Ctrl+Alt+C to fire the command. Your file will be converted to HTML using Atom's internal Markdown renderer and copied, ready for use in any application that accepts pasted rich text.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.