Planeshift and Dofus are be available for mac and free, but best is Planeshift .
About Planeshift :
It is a cross-platform fantasy MMORPG in development. Client software is available for Linux, Windows and Mac OS X. It is a no-budget project produced by a group of developers, founded by Luca Pancallo, and guided by the Atomic Blue non-profit organization. The server side engine code is completely written from scratch by PlaneShift team, while the 3d rendering features are based on the Crystal Space 3D engine. The game engine is released under the GNU General Public License (GPL), available to anyone for download. The content is released under a proprietary license.
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I wish I could help you but currently I haven't found any truly good ftp mac games.
There is Seyken which is ftp completely, but it's rather low quality. It is developed by a single person though so I can't really blame them.
Planeshift and Dofus are be available for mac and free, but best is Planeshift .
About Planeshift :
It is a cross-platform fantasy MMORPG in development. Client software is available for Linux, Windows and Mac OS X. It is a no-budget project produced by a group of developers, founded by Luca Pancallo, and guided by the Atomic Blue non-profit organization. The server side engine code is completely written from scratch by PlaneShift team, while the 3d rendering features are based on the Crystal Space 3D engine. The game engine is released under the GNU General Public License (GPL), available to anyone for download. The content is released under a proprietary license.