Are you tired of opening Vellum and getting the notification that KindleGen isn’t optimized for your Mac and will need to be updated? You should install the update that came out last Tuesday!

There’s a full post on the Vellum blog here, but the practical upshot is Vellum will now generate a Kindle-specific epub rather than a mobi file. If you’re a Mac user you definitely want to install this update before upgrading to Catalina next month, as KindleGen won’t work after the update.