Like on the iPhone, iPad, and iPod touch, when you download an app it automatically installs it on all of your iOS devices if the option is turned on and the devices are logged into the same App Store account. A similar feature has been added in the latest developer preview of OS X Mountain Lion. In the latest build, if your Macs are logged into the same App Store account, the app will automatically install on all Macs. It seems that OS X Mountain Lion is all about unification rather than iOS-ification.
Apple has been frequently releasing updates of OS X Mountain Lion to its Mac developer community, and the company is expected to offer many more details on the next-generation operating system at next month’s Worldwide Developers Conference in San Francisco. The OS is expected to see a public launch in “late summer” of this year.