This is the official beta version of SmartGo for the Mac. Missing many features. Just use the Windows version with Wine...

This is the latest Windows version processed with WineBottler to make a Mac app. All the features of the Windows version!

SmartGo for Windows is the complete tool for Go players, with a database of more than 105,000 professional games. Compared to other Go programs, SmartGo is more powerful and easier to use. It’s a tool to play, record, replay, analyze, annotate, and print Go games. If you ever deal with SGF files, you want SmartGo.

Here you'll find 40000 Japanese professional go games in SGF format

A very nice graphical user interface for Windows, Mac and Linux

Leela is a strong Go playing program combining advances in Go programming and further original research into a small, easy to use graphical interface.