Mac OS X 10.7.3

Mac OS X 10.7.3 was an update for Lion released on February 1, 2012. It has the build number 11D50. This release provided the following updates:
 * Added support for USB 3.X
 * Added Catalan, Croatian, Greek, Hebrew, Romanian, Slovak, Thai, and Ukrainian language support
 * Addressed issues when using smart cards to log into OS X
 * Resolved issues authenticating with directory services
 * Addressed compatibility issues with Windows file sharing

External References
OS X Lion Update (Client Combo)