This is the way of Indie Mac development. Create a tool that either does something (one thing) new or does something old in a new, easier way. Make it beautiful and fun to use. Take advantage of the APIs Apple provides, like Core Animation. Make a slick web site with a forum, blog, and user-contributed content, put a screen cast showing how cool the app is, provide a demo and charge a reasonable price for the full version. Finally, create a silly, punny company name. Like atebits. Heh.