This app works as advertised, and I’m running the latest version of Mavericks. The unnarrated instructional video is kind of a joke but once you start using the app, you’ll catch on quickly and learn to love it. One of my favorite features is dragging a URL favicon to a To-Do window and having it create a link for future viewing (you can shorten its name). That helps keep my desktop uncluttered and gives me a quick, visible reminder. I did have one question for the developer. Response time was quick. Forget Task Paper and get this one.