mIRC Alternatives for Mac OS X

Pidgin is a free and open-source multi-protocol instant messaging client designed to connect users across various chat networks with a single application. It's highly extensible through plugins and supports a wide range of protocols including XMPP, ICQ, and IRC.

Irssi is a highly customizable command-line IRC client popular among power users and system administrators for its extensibility and efficiency.

Quassel IRC is a powerful, distributed, and cross-platform IRC client designed for continuous connectivity and efficient management of multiple IRC networks and conversations.

Colloquy is more than just a loyalty platform; it's a comprehensive customer engagement and data analytics solution designed to foster deep relationships and drive business growth. It provides tools for managing customer loyalty programs, facilitating direct communication, and deriving actionable insights from customer data.

KVIrc is a versatile and highly customizable graphical IRC client available for Linux, Unix, macOS, and Windows. It is designed to cater to both seasoned IRC users seeking advanced control and newcomers looking for a user-friendly interface to connect to various IRC networks.

Smuxi is a feature-rich, cross-platform IRC client designed with productivity and usability in mind. Inspired by the command-line power of Irssi, it provides a graphical interface for seamless communication across multiple networks including IRC, XMPP, and Twitter.

WeeChat is a highly customizable, free and open-source command-line based chat client. Designed for efficiency and portability, it supports multiple protocols including IRC and XMPP, making it a versatile tool for connecting to various networks.

AdiIRC is a feature-rich and highly customizable free IRC client designed for both casual users and power users. It offers a portable experience, extensive customization options, and support for various IRC networks and protocols.

ZNC is a highly configurable IRC bouncer designed to maintain a persistent connection to IRC networks, allowing users to detach and reattach with their IRC client without losing context. It ensures you stay connected and informed even when your client is offline.

Multi-platform IRC client tightly integrated with Mozilla browsers, offering a familiar interface for seamless chat experiences.

Textual is a premium Internet Relay Chat (IRC) client exclusively designed for macOS. It provides a user-friendly interface, extensive customization options through themes and plugins, and robust support for common IRC features, aiming to offer a modern and polished chat experience.

LimeChat is a feature-rich and user-friendly Internet Relay Chat (IRC) client specifically designed for macOS. It provides a clean interface for connecting to multiple IRC networks and channels.