When comparing Macchiato vs MWeb, the Slant community recommends MWeb for most people. In the question“What is the best Markdown editor for OS X?” MWeb is ranked 18th while Macchiato is ranked 23rd.
Ranked in these QuestionsQuestion Ranking
Pro Does not distract the user
Macchiato does not get in the way. It has a minimalist UI that highlights Markdown syntax.
Pro Support for latest Mac OSX features
Macchiato supports Mac OSX features like fullscreen mode, auto-save and version history.
Pro Excellent support of LaTeX equations
Pro Small but powerful
It has file tree, can post article, can upload pictures, can render in pretty preview themes, and is small and fast.
Pro Syntax highlighting in fenced code blocks
MWeb has syntax highlighting for some popular programming languages inside fenced code blocks.
Pro Supports publishing to popular web platforms
MWeb can publish Markdown files to various web platforms including (but not limited to) Wordpress, Metaweblog, Evernote, Blogger and Tumblr.
Pro Drag & drop or paste photos to the editor and display
Supports adding pictures to a Markdown file either through drag-and-drop or by pasting it.
Con Software is somewhat expensive and there's no trial version to test it out
Macchiato costs $19.99 and offers no way of testing the software before buying.
Con No free version
MWeb costs $14.99 and is available on the Mac App Store. There's a free trial available but it's only for 14 days which may not be enough to make a good evaluation of the software before buying.