How to Use AirPlay Mirroring on a Mac with OS X 10.8 Mountain Lion
Apple TV owners have an extra incentive to try out OS X Mountain Lion Dev Preview; AirPlay Mirroring. With AirPlay Mirroring, you can stream the Mac desktop and whatever application is on screen to an HDTV wirelessly through the Apple TV, making it easier than ever to watch videos from a Mac or play games on a much larger TV screen from a couch. It’s a great feature that finally came to the Mac with OS X 10.8 Mountain Lion, here’s what you’ll need to use it:
- iOS 5.1 beta 2 or later installed on the Apple TV
- OS X 10.8 Mountain Lion installed
Until the public release, these two requirements need developer access, without iOS 5.1+ being on the Apple TV you will get a device error. Most Macs that match the OS X Mountain Lion system requirements should support AirPlay Mirroring, but 9to5mac has noticed that some 2010 model Macs don’t have the feature enabled yet, so don’t be shocked if the earlier OS X 10.8 builds are more restrictive than the shipping version.
Using AirPlay Mirroring on a Mac
- Open System Preferences and click on “Displays”
- If the Mac supports AirPlay Mirroring, you will find an “AirPlay Mirroring” option near the bottom of the Displays preference panel, click this and select “Apple TV”
At this point OS X 10.8 will detect the Apple TV, resize the screen if necessary, and start mirroring what is on the Mac to the HDTV.
All video should work perfectly, including YouTube and Hulu, which should ultimately make AirPlay much more valuable.