Turbine has launched a beta client for The Lord of the Rings Online for the Mac.

Mac users in North America and Europe can play the award-winning free-to-play MMORPG on Mac at http://www.lotro.com/ . Just remember: beta software is unfinished software so use with care.
 
Here’s how the game is described: “The Lord of the Rings Online is the ultimate adventure! This award-winning free-to-play massively multiplayer online role-playing game delivers an interactive experience brimming with life and filled with the familiar people, places, and monsters from the most famous fantasy of all time.  For more information, visit www.lotro.com .”