Apple has been seeding various builds of OS X Mavericks 10.9.1 to beta testers and AppleCare employees for a few weeks now, and today the final shipping version has been made available as a free update for all Macs running the latest version of Apple's operating system, OS X Mavericks.
As part of their continued efforts to improve the overall functionality and stability of Mavericks, Apple has today distributed the first seed of OS X 10.9.1 to registered developers. The same 10.9.1 seed that has been released into the developer portal has also previously been distributed amongst specific Apple internal employees with the hope of ensuring that everything runs as smoothly as possible before it gets installed onto the machines of end-users.