First beta of OS X Mountain Lion 10.8.5 to developers released.

Following the release of X Mountain Lion 10.8.4 in Jun, 2013, Apple has released the first beta of OS X Mountain Lion 10.8.5 to
developers for testing.

Under the number 12F9, it focuses on: Wi-Fi, Graphics, Wake from Sleep, PDF viewing and Accessibility. You can learn more here!