November 12, 2010 Patch (Portal)

{{Patch layout
 * game = portal
 * source      = http://store.steampowered.com/news/4639/
 * source-title = Portal Update Released
 * before      = August 17, 2010 Patch (Portal)
 * after       = March 2, 2011 Patch (Portal)
 * notes       =

Portal
}}
 * Added engine support for improved NVIDIA OpenGL multisampling options available in Mac OS X version 10.6.5