user1962: What are good chess clients for Mac, that allow playing on FICS. Nice-to-haves are an opening book, plug-and-play engines, and scoring of chess positions.
EDIT: For completeness, note that Jin does not allow you to save games. FICS can email them to you if you turn on a setting, but no way to recover guest games with Jin. I think this is a complete deal breaker.

user9164: When I switched to OSX I noticed that Babaschess would not run. Since I am a developer I started creating my own client.. Please, have a look and let me know what you think. It doesn't support chess engines to analyze positions, but saves your games as pgn.
http://www.macbeth-ficsclient.com/

user10078: If you want something very simple to start with, try LightFICS:
http://lightfics.brrm.ru/
It's a native Mac OS X FICS client. It has no dependencies, is extremely easy to install and use.
It doesn't have any nice-to-haves, but you can save games as PGN and use other tools to analyse openings with engines.

user1824: You have choices:
i. Kibitz, implemented features are

Playing and observing chess games on FICS
Observing multiple games
Chat with other users on FICS
Support for chess variants including "Bughouse" and "Crazyhouse"

ii. Raptor, FICS desktop client for Mac
iii. Jin, which is Java based and can be executed on a Mac also.
iv. XBoard, a multi platform solution!
 
and such a pity that you can't try BabasChess (maybe you can use a emulator to execute it on your Mac)

1962: <p>What are good chess clients for Mac, that allow playing on FICS. Nice-to-haves are an opening book, plug-and-play engines, and scoring of chess positions.</p>

<p>EDIT: For completeness, note that Jin does not allow you to save games. FICS can email them to you if you turn on a setting, but no way to recover guest games with Jin. I think this is a complete deal breaker.</p>
 9164: <p>When I switched to OSX I noticed that Babaschess would not run. Since I am a developer I started creating my own client.. Please, have a look and let me know what you think. It doesn't support chess engines to analyze positions, but saves your games as pgn.</p>

<p><a href="http://www.macbeth-ficsclient.com/" rel="nofollow">http://www.macbeth-ficsclient.com/</a></p>
 10078: <p>If you want something very simple to start with, try LightFICS:
<a href="http://lightfics.brrm.ru/" rel="nofollow">http://lightfics.brrm.ru/</a></p>

<p>It's a native <a href="http://lightfics.brrm.ru/" rel="nofollow">Mac OS X FICS client</a>. It has no dependencies, is extremely easy to install and use.
It doesn't have any nice-to-haves, but you can save games as PGN and use other tools to analyse openings with engines.</p>
 1824: <p>You have choices:</p>

<p>i. <a href="http://kibitz.berlios.de/Kibitz%20Home.html" rel="nofollow">Kibitz</a>, implemented features are</p>

<ul>
<li>Playing and observing chess games on FICS</li>
<li>Observing multiple games</li>
<li>Chat with other users on FICS</li>
<li>Support for chess variants including "Bughouse" and "Crazyhouse"</li>
</ul>

<p>ii. <a href="http://chesshive.com/2011/08/raptor-chess-fics-desktop-client-for-mac/" rel="nofollow">Raptor</a>, FICS desktop client for Mac</p>

<p>iii. <a href="http://www.jinchess.com/" rel="nofollow">Jin</a>, which is Java based and can be executed on a Mac also.</p>

<p>iv. <a href="http://www.open-aurec.com/wbforum/viewtopic.php?f=19&amp;t=50428" rel="nofollow">XBoard</a>, a multi platform solution!</p>

<p>&nbsp;</p>

<p>and such a pity that you can't try <a href="http://www.babaschess.net/" rel="nofollow">BabasChess</a> (maybe you can use a emulator to execute it on your Mac)</p>
