GZDoom for OS X

GZDoom for Mac OS X is a fork of GZDoom by Alexey Lysiuk (_mental_). The primary aim was to have a ZDoom port with OpenGL rendering on the Macintosh, but it has since obtained additional features.

Features
In addition to all ZDoom and GZDoom features, GZDoom for OS X offers:
 * Rewritten OpenGL renderer
 * Support for loading the Xbox 360 IWADs from their diskfiles
 * post-processing
 * Automatic loading of the TNT: Evilution MAP31 fix patch
 * Automatic handling of Mordeth's MORGRAP0.WAD's lack of namespace markers
 * Enhanced optional display of time in the alternate HUD

Some features introduced there were since backported to ZDoom and GZDoom, including:
 * Berserk indicator in the alternate HUD