OS X Mavericks (version 10.9), released in , was a landmark update for Apple's desktop operating system, primarily because it was the first to be offered as a free upgrade . It also marked the end of the "Big Cat" naming convention (e.g., Lion, Snow Leopard) in favor of California-themed names. Core Technical Advancements
Since "piece" can have a few different meanings in this context, here are the most likely interpretations of your request: os x mavericks 10.9
Before Mavericks, using multiple monitors on a Mac was often a clunky experience. Mavericks fixed this by treating each display as an independent entity. Users could finally access the Menu Bar and the Dock on every screen, and apps could be run in full-screen mode on one monitor without blacking out the others. 2. Finder Tabs and Tags OS X Mavericks (version 10
OS X Mavericks (10.9): The Release That Changed the Mac Forever Mavericks fixed this by treating each display as
If you are looking for a piece of the operating system to download: