Yahoo! has released its first public beta of Yahoo! Messenger for Mac OS X 3.0.

The new instant messaging software offers a more Mac OS X-like user interface that has been built using Apple's Cocoa development environment.

New features in the Mac release include webcam support across PCs and Macs, stealth settings, and support for avatars and animated emoticons. It also offers an instant-messaging indicator that sits in the Dock.

The software also provides visual notifications using the Growl system and instant messaging alerts for Yahoo! Calendar, Mail and Personals.

Additional features include voice chat, file transfer, mail, stock-quote alerts, sports scores, news and more.

The older version of the IM client (version 2.5.3) remains available for Macs.