Textual (5.1) Mac (OS X)

Textual 5.1
Official Website

Textual is the world's most popular application for interacting
with Internet Relay Chat (IRC) chatrooms on OS X.
Beautiful Interface
Textual includes two elegantly designed light and dark variants of the user interface to match all tastes.
Powerful, yet lightweight
Textual supports very powerful modern technologies such as native IPv6, direct client-to-client file transfers, the latest IRCv3 specifications, client-side certificate authentication, and much, much more in a lightweight, easy to navigate, clutter free environment.
Privacy is valued
Sensitive information such as passwords are maintained within the OS X keychain which is encrypted. Additionally, text based encryption with automatic key-exchange using industry proven standards is available.

Please think about purchasing the app, if you enjoy it.
Seed as long as possible, don't forget to say thanks.