Recently, Apple's latest operating system iMac OS X 10.9 Mavericks will be available for free in Mac App Store from today.
Many features are improved in the OS X 10.9 Mavericks, the update improvement includes more robust notification system with inline replies, much better support given to multiple monitors, now apps can maximize to full screen, a revamp of finder and new iCloud Keychain for saving passwords ( this feature also included in latest iPad ).
Many other apps have been updated, Apple done lot of work on apps to boost OS X and iOS 7.03 ( Launched).
You really like that Apple has distributing updated OS X Mavericks without charging a cent - Totaly Free. This free update is available on Mac Store to every one.