Run tabletop roleplaying games as a Dungeon Master from a network-connected Mac. Control all aspects of a session by checking the dice rolls, observing the set conditions, providing the info on encounters of the current party, track their status and levels, etc.
nplayer 4.1.3 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac application is an intellectual property of Fjelds. Nplayer for Mac lies within Games, more precisely Tools. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
Nplayer is a D20 RolePlayingGame Java engine with a Graphical User Interface, aiming at granting a Dungeon Master maximum control over gameplay to meet most challenging encounters, rulewise, through a slick GUI. Now geared at 4th Edition Dungeons and Dragons.
You may want to check out more software for Mac, such as Map Editor, PPF-O-Matic or lxdream, which might be similar to nplayer.