Goban is working for me on El Capitan, but I installed it before upgrading. There's also the older free version which might still be up on a webpage somewhere.

Goban is working for me on El Capitan, but I installed it before upgrading. There's also the older free version which might still be up on a webpage somewhere. But the better option is that I was able to get GoGui working - I did have to manually build/compile it myself but there is a way to build it so that it creates a real OS X Application. It's quite good, you can set any board position and then tell a computer program to respond from that point. http://gogui.sourceforge.net http://gogui.sourceforge.net EDIT: For the iPhone I like SmartGo Kifu for playing games. 'Tsumego Pro' and 'GoProblems' for puzzles (they're adaptive) and 'Go Books' by smartgo for ebooks.