The 2.1 version of Marko for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this Mac application is TXTLABS.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The application relates to Productivity Tools. You can install this app on Mac OS X 10.10 or later. The most popular versions of the software are 2.1, 2.0 and 1.2. The bundle identifier for this application is com.txtlabs.marko.
From the developer:
Preview Markdown documents and convert to HTML or PDF.
Use Marko side-by-side with your favorite text editor to preview your Markdown documents as you write.
You may want to check out more Mac applications, such as JGMsmart.TC, Artisan or PinMEMO, which might be related to Marko.