Less than a week out from WWDC, Apple's issuing the latest update to Mountain Lion. The company's recommending the newest version of the operating system for security / stability reasons. For the most part, however, there doesn't seem to be anything too big in here. OS X 10.8.4 looks to primarily address some bugs, including WiFi network compatibility, Calendar / Exchange usage, as well as fixes to FaceTime calling, Boot Camp and Safari. Also on the list are improvements to mobile account compatibility, iMessage display and Calendar Birthdays. Check the source link below for the full list of fixes.