SUPERB CHESS BOARD (Chess PGN Viewer & Maker) is a iMac application which allows you to view and create PGN format chess games and visualizes moves from its notation.
It has training mode. You can play on the board, insert variations of other moves, you can create and save your own chess PGN files with PGN Maker.
App can Show comments if the PGN file including comments, and Insert comments and move assessment when you create PGN file.
App can open the variations of other moves.

Features
1) Multiple games per PGN file.
2) Displaying PGN Game Contents.
3) Visualizing Chess Moves From Notation.
4) Training Mode.
5) Flip board and change chess board color and chess piece.
6) Paste Move History string into the textview, then visualizes moves, and save the string.
7) Create and save your own chess PGN files.
8) Support edit chess position for middle or ending game when you play on the board.
9) Show comments if the PGN file including comments.
10) Insert comments and move assessment when you create PGN file.
11) App includes thousands of game collection.
12) Insert and Open the variations of other moves.

After more than 10 thousands of chess PGN file test, the App (version 7.5 or later) can read most of those PGN files normally. And if you find some issues in reading PGN file, please send the PGN file to me by email, I will try to fix the bug.