Mac OS X 10.7.1 was released on August 16, 2011. It has the build number 11B2118 for the Mid 2011 Mac Mini and Mid 2011 MacBook Air and the build number 11B26 otherwise. It included fixes that: * Address an issue that may cause the system to become unresponsive when playing a video in Safari * Resolve an issue that may cause system audio to stop working when using HDMI or optical audio out * Improve the reliability of Wi-Fi connections * Resolve an issue that prevents transfer of your data, settings, and compatible applications to a new Mac running OS X Lion