Download of MMD2LaTeX 4.5.3 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The most popular version of MMD2LaTeX for Mac is 3.5. The program lies within Productivity Tools, more precisely Office Tools. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This free Mac app is an intellectual property of fletcherpenney.
From the developer:
MultiMarkdown, or MMD, is a tool to help turn minimally marked-up plain text into well formatted documents, including HTML, PDF (by way of LaTeX), OPML, or OpenDocument (specifically, Flat OpenDocument or ‘.fodt’, which can in turn be converted into RTF, Microsoft Word, or virtually any other word-processing format).
You may want to check out more Mac applications, such as iTeXMac2, PDFViewer or Instant PDF, which might be similar to MMD2LaTeX.