Sticking to its accelerated releases schedule for operating system upgrades which now calls for one major OS X release each year, Apple's software teams have now began work on what would become the fourth major update to OS X Mavericks.
Simultaneously, its main group continues work on OS X 10.10, which will be previewed at next Monday's WWDC alongside iOS 8 and other "exciting" goodies.
The first OS X Mavericks 10.9.4 beta (build 13E9) has now been seeded to Apple's registered Mac developers. The work-in-progress software should become available to the general public through the company's OS X Beta Seed Program...