Marked 2 is a great Mac utility for previewing Markdown files as fully rendered rich text. It works with many text and writing apps, including Bear.

With the macOS version of Bear you can preview a note in Marked 2 by selecting Note -> Preview in Marked in the menu bar.

Note:

1. In case of unexpected preview results, please go to the Marked 2 preferences and make sure the setting under the Processor Tab is set to “Process Markdown with: MultiMarkdown”
2. If you want the checkboxes displayed in Marked 2, please enable “Render GitHub Checkboxes” under Rendering setting in the same preference tab above