According to popular Apple blog 9to5mac, Mac OS X 10.9 is to feature full voice activation that debuted in the iPhone 4S and iPhone 5 via Siri. It is also set to feature Apple's native Maps program introduced in iOS 6 earlier this year, which recieved some interesting reviews at the time of release. The main aim of this move is to allow developers to use the mapping API in their own applications and software for Mac computers.
Recently, Apple has reduced the time between major Mac OS X releases, with OS X 10.8 Mountain Lion being released just under a year before OS X 10.7 Lion, making the release cycle more similar to that of iOS. Also, OS X has often acquired application and utilities originally found in iOS, such as the Notification Center, Game Center and iMessage released in OS X 10.8 Mountain Lion. To aid in the closer integration of these two operating systems, Apple software engineer and vice president Craig Federighi is now managing development of both iOS and Mac OS X and has been since late October this year. We can expect to see even closer integration between the two platforms in the near future.