Kibitz is an Interface for the Free-Internet-Chess-Server (FICS) and Mac OS X
(The SourceForge binary version 0.1 from 2006 seems to work on "Mavericks" 10.9.2 ... )
What is Kibitz?
Kibitz is an Interface for the Free-Internet-Chess-Server (FICS) running natively under Mac OS X / Cocoa.
Features implemented in current (pre-alpha) version:
• Playing and observing chess games on FICS
• Observing multiple games
• Chat with other users on FICS
• Support for chess variants including "Bughouse" and "Crazyhouse"
Kibitz compiles as universal binary (support for Intel and PowerPC Macs)
http://kibitz.berlios.de/
https://sourceforge.net/projects/kibitz.berlios/
Try this to download it: https://sourceforge.net/projects/kibitz.berlios/files/latest/download