Apple has released the Golden Master of OS X 10.9 “Mavericks” and Xcode 5.0.1 to developers through the Mac Dev Center here. Learn more about the changes in Mavericks here.
Apple has also released OS X 10.8.5 “Mountain Lion” Supplemental Update. The update fixes issues that may prevent HDMI audio and certain USB Bluetooth adapters from working.
It also fixes an issue that caused external drives to be ejected after the computer goes to sleep and another issue that prevented some applications from using the FaceTime HD camera on mid-2013 Macbook Air systems. Learn more about the update and download it here.
