Perhaps I don’t understand the app, but it appears that the author sets the first kakari move by white and won’t allow you to try others. That leaves off tons of other joseki variations. Also, the joseki exposition stops early. Most joseki dictionaries show more moves. This is quite inferior to joseki apps in IOS. It’s also inferior to Kogo's Joseki Dictionary, which is free. An app for OSX should be more powerful.**Update… I’m increasing my rating to 4 stars from 2 stars. There are some interesting variations presented that aren’t available elsewhere. I especially liked the ideas for followup to pincer plays and also the bi-swallows (double kakari). I wish there was more commentary, though. Also, I would like to be able to continue exploring a variation even though the “official” variation has reached its limit. This app won’t let you make a move not programmed in first..

As the title this is the most interactive joseki collection I've ever seen. UI is simple yet straight and intuitive, with rich knowledge about Go.

It doesn't run in my MacBook Pro... waste of money. Also, there's no support whatsoever. This is a crime.