Apple is rumored to have thrown the Golden Master version of Xcode to a number of developers. When the schedule of the launch of the Golden Master version of this, then the OS X Mavericks or OS X 10.9 can be downloaded around October.
The OS X Mavericks offers a number of changes and feature additions. Some of them are changes in the Finder search, search some files or documents through the Finder, now could be easier because the zoom is present in the form of multiple windows at once. Although it can be opened in a window, but the Mavericks OS X users can also combine into a single window.
By using these new features, allowing OS X Mavericks cut so that the memory usage on the MacBook battery can be more efficient.