jIRCii is a powerful Mac OS X Internet Relay Chat client. jIRCii is scriptable. The focus is to provide a UNIX console client experience with the advantages of a solid GUI. Some call it the closest thing to mIRC on MacOS X. Features include DCC file transfers, IRC over SSL support, multiple server connections, and over 75 built-in commands.
JOE2100 I hunted for a good irc mac client for a while before settling on this little gem. Do yourself a favor and check this out. The default color scheme is easy on the eyes, the layout is pretty intuitive. It has lots of features and best of all its FREE. My only complaint is the icon. Developer, plz hire someone to fix this and you will have the perfect package. (Version 11.26.07)
DEKKARD I use jIRCii on both my mac (panther 10.3.9) and on my linux box(ubuntu hoary) and it does a great job, i love the ease with wich you can customize the colors and the abundance of simple aliase commands ala BX.. There have been some great addon scripts written by the small but growing "sleep" scripting community as well. Frankly it leaves the mac irssi clones in the dust in terms of responsiveness. It just keeps on getting better and better.. and if there is a feature you want, let the dev(butane) know and he will consider it, or tell you how to script that functionality for yourself. (Version 05.08.05)