The launch of the next version of Mac OS X may be days away after Apple seeded the Gold Master version to developers.
Mac OS X 10.8 Mountain Lion has been available in Beta for developers, but this latest version is all-but complete with very few changes likely before the full version is outed to consumers.
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Apple has incorporated a host of functionality from its popular iOS mobile software including AirPlay Mirroring which allows Apple TV owners to wirelessly send content to their HD TVs.
More iOS-alike features
There's also the Messages app, which brings instant free instant messages between OS X and iOS device users, along with the Notes and Reminders apps.
Apple is also bringing system-wide Facebook and Twitter integration, a new Voice Dictation feature, Game Center, offline reading in Safari and improved security settings.
The upgrade will be just $20 for US users from the Mac App Store and we'd expect that to translate into around £15-£20 when Apple outs the OS, probably within the next couple of weeks.