WWDC 2011. Lion achieved status on July 1, 2011. http://en.wikipedia.org/wiki/Mac_OS_X_Lion Also new features Address Book  now uses an iPad-like user interface [ citation needed ] AirDrop  – Lion-to-Lion direct file sharing via  Wi-Fi Direct . No  wireless access point  required. [15] Address space layout randomization  – Address space layout randomization (ASLR),