Additional integration with Facebook includes being able to 'like' individual games and challenge friends to beat your high scores. You can also share your scores on Facebook, Twitter, Mail, or Messages in OS X Mountain Lion. AirPlay will allow Mac and iOS users to play against one another. Gaming is becoming increasingly important on OS X and Game Center allows you to download games, play against friends and save your progress. Software updates are now fully integrated with the Mac App Store and can be downloaded directly. Time Machine can now also run in PowerNap mode, which allows the operating system to update itself while the computer is sleeping. Time Machine now allows you to select more than one hard drive to save backups. Amongst other things, Messages offers unlimited free iMessages, video conferencing with Facetime and photo/file sending. Lion users can try the beta version of Messages which is the same as iMessage on iOS but the final stable version only works on Mountain Lion. It integrates the address bar and search box including Google searches, favorites and history. Omnibar is an added feature to Google Chrome in Mountain Lion. Password Tabs allows you to see passwords saved in Safari. Facebook sharing has also been integrated into OS X Mountain Lion, as anticipated. A universal share button has been added to Safari's URL bar for reading later, add to bookmarks, e-mail, or Twitter.
