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[Free] OS X Dashboard ChessPuzzle Widget [OS 10.4 required] with 6,000 puzzles and Sjeng chess engine
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[ $40 commercial] Grandmaster strength, many training features. OS X 10.2+ and DVD drive required. Released Dec. 2004.
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[Freeware] Version of Crafty with code added so that ExaChess can be used as a GUI interface and computer-computer umpire.
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[Freeware] Master strength chess engine, text interface only. Updated March 2001.
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[Shareware $20] Mac OSX Front end to Crafty with PGN browser. Updated 12-13-05.
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[Freeware] UCI GUI with two engines: Glaurung (normal chess), Scatha (Glinski's hexagonal chess), requires OSX 10.3.9+, updated 7/13/2007
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[Commercial $50/$100] Strongest Macintosh chess program, in UCI engine form for Mac OS/X. Single and multiprocessor versions. [Out Apr. 2, 2007]
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[Commercial - $48] Macintosh OS9/Classic version of a former world champion chess program.
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[Freeware] Master strength freeware program, ExaChess compatible, and with English/German/Dutch/Italian versions available.
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Lists software for Mac OS X, classic, X11 and pre-OS X. Includes information for compiling and configuring X11 and XBoard based applications.
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ChessKing 1.0 - Challenge a friend to a game of chess.
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ChessMate 6.3.5 - Play chess against your computer or friend.
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[Freeware] Chess playing program with many easy levels for beginners to win against.
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[Freeware] Master strength program, also works as ExaChess engine.
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Commercial [ $30-$100] The Macintosh version of the 2005 World Computer Chess Blitz champion. Downloadable Demo, Universal bineary. Updated 2006.
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[Freeware] Free Macintosh chess program has 3D set, prints games with diagrams, includes HIARCS 11 Lite, runs UCI chess engines. [ out Apr. 2, 2007]
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Tim Mann's GNU page. A very useful resource for GNU Chess. It includes an FAQ.
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[Freeware] This is a multi-document, multi-threaded chess application for Mac OS Classic PowerPCs ( Mac OS 8.6-9.2)
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[Shareware-$19] Prints games to printer or web (HTML) in two columns with annotations and color diagrams. Requires OSX.
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[Freeware] Simple OS/X chess game / PGN viewer in Java. Updated March 2007