Apple has begun seeding its next OS X Mountain Lion update, OS X 10.8.4, to AppleSeed testers. Apple will likely begin seeding this to registered OS X developers soon…
iPad Air 2
Apple does not specify what the update includes, but it is likely focused on bug fixes and performance improvements like most OS X maintenance releases. Apple asks developers to focus on WiFi, Graphics Drivers, and Safari.
Update: It has now been released for registered developers.