Security vulnerabilities are also fixed which were discovered in Apache, Certificate Trust Policy, Bind, ClamAV, ImageIO, CoreGraphics, Installer, Kernel, IPSec, Mobile Device Management, PHP, PostgreSQL, OpenSSL, Power Management, Screen Lock, QuickTime, and sudo. Moreover, Xsan reliability, transfer of huge files over the ethernet, Open Directory Server authentication, and many other improvements are also there so the system can deliver better performance within the network. Screen Saver fixes are also made as well as Mail issues have also been addressed in this release. Wifi performance is also greatly enhanced for 802.11ac for AFP file transfer. There are numerous fixes and improvements in this release so to make it a stable operating system. You will find every feature you need in this release. Comes up with a sleeker and very friendly user interface to handle all the problems with a comfortable environment. This version tends to be more secure and even more efficient than the previous versions of Mac OS. Apple has now released the Mac OS X 10.8.5 Mountain Lion release after a long beta period.