Version 1.3.0 of PreviewMarkdown has just been released. Its key new feature: you now have the option to view YAML front matter in Markdown file previews. This is really handy if, like me, you use a static site generator and use YAML to record content metadata at the top of your Markdown page files.
If you don’t use YAML in your Markdown files, you won’t see any changes, of course. If you do use YAML, but don’t want to see it in your file previews, no problem — the feature is entirely optional and can be turned off in PreviewMarkdown’s Preferences panel.
In addition to adding YAML support, I’ve been working to make PreviewMarkdown’s Thumbnailer — the app extension that draws icon thumbnails in Finder windows — thread safe so that it’s more resilient when spawned across multiple Finder threads. The upshot: you shouldn’t see those occasional instances of thumbnails being replaced by generic or editor-specific icons. I covered this issue, its solution and the ‘hidden’ Xcode tools that helped me track it down in last week’s post.