Mountain Lion, the next OSX iteration after Lion will be released in July 2012, it has been announced at Apple’s WWDC (World Wide Developer Conference).
The operating system will be available on the Mac App Store for $19.99 to upgrade. This is a drop from $29.99 for the previous update. And users who didn’t get the last upgrade Lion, and are still on Snow Leopard will be able to upgrade.
— Paul ? (@paulsavage) June 14, 2012