OS X Mountain Lion

     This new system is somewhat replacing the desktop for Macs.  Like the iPhone, there is a swipe down Notification Center.  They have also added Twitter and Game Center to the apps.  One of the coolest features is Airplay Mirroring.  This is made for an audience where you can stream whats on your iMac to your HDTV via Apple TV.  You can share videos with friends, share lessons with a classroom, or present in a conference.  There are probably many other things you can do with the Airplay Mirroring.  This system was designed for the iPad, but was re-invented for the iMac.