MacRumors writes, Apple's set to release the latest version of OS X later this month. OS X Mountain Lion (10.8) is a $19.99 upgrade that will be available on the Mac App Store. The latest Mac operating system contains a number of improvements and features. The list includes Reminders, Messages, Notification Center, Power Nap, Dictation, Gatekeeper and many more. Apple has only said that the new version of OS X will launch in July, but 9to5Mac now speculates that Apple may be launching the new version of OS X on July 25th. The reasoning comes from reports that Apple Retail stores will be performing overnight...