Apple has started to notify developers  to submit Mac App Store submissions for OS X Lion. Yesterday, Apple sent  out an email to developers  saying that OS X Lion will “soon be available to millions of Mac users around the world.”  They want to ensure that Mac apps are OS X Lion compatible so they can be available on the Mac App Store when OS X Lion ships sometime this month.

Apple has said that OS X Lion will become available later this month, and rumors have suggested a launch date for the 14th. Once released, OS X Lion will only be available via the Mac App Store.