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Mac OS,
is a series of GUI based operating systems developed, marketed and sold by Apple Inc. for their Macintosh line of computer systems since 1984, with its range of processors from 68000, PowerPC, x86 and x86-64 [1]. Mac OS X, released in 2002, developed from Mac OS classic family, and NeXTSTEP, was UNIX-based.

Chess Programs

GUI Screenshots


Macintosh Sigma Chess 6.2 with Hiarcs [2] [3]


XBoard port with native Quarz interface, so that X11/XQuartz is no longer needed [4] [5]

Dynamic List

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Forum Posts

2010 ...

2015 ...

External Links


  1. ^ Apple's transition to Intel processors
  2. ^ Macintosh Chess: Sigma Chess HIARCS Chess Software Program
  3. ^ Sigma Chess & HIARCS
  4. ^ OSX Xboard 4.7.2 .app by Joshua Pettus, CCC, October 16, 2013
  5. ^ XBoard native Mac App by Harm Geert Muller, Hiarcs Forum, December 18, 2013
  6. ^ Xcode from Wikipedia

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