May 10, 2011 Patch

{{Patch layout
 * source = http://store.steampowered.com/news/5448/
 * source-title = Portal 2 Update Released


 * before = May 6, 2011 Patch
 * after = May 12, 2011 Patch


 * notes =

Portal 2
}}
 * Improved MSAA rendering performance for Mac OSX