Is there an updated document from Apple showing support for Airplay Mirroring?
All I can find is this one, last updated April 13, 2012:
http://support.apple.com/kb/HT4437
Is there a list for Mountain Lion support somewhere?
None of my machines, including my 2 year old (mid-2010) iMac 27 i7 with ATI
Radeon HD 5750 1024 MB is "advanced" enough:
http://www.apple.com/osx/whats-new/features.html
Wireless mirroring
Send what’s on your Mac screen to an HDTV wirelessly with Apple TV. Mirroring
is great for classrooms, conference rooms, and your living room.
High definition
AirPlay Mirroring sends a video stream automatically optimized for the HD
capabilities of your Mac and Apple TV. It supports up to 1080p HD.
Automatic detection
When a Mac with Mountain Lion detects an Apple TV on the same network, the
AirPlay Mirroring menu item appears in the menu bar.
Menu item
To wirelessly mirror your Mac to your HDTV, click the AirPlay Mirroring menu
item and choose your Apple TV. Use the menu to select a different Apple TV on
your network and set resolution matching.
Resolution matching
AirPlay Mirroring scales the contents of your Mac desktop to fit on your HDTV.
For a sharper image, choose to set the resolution of your desktop to best match
that of your Apple TV.
Seamless integration with iTunes
When you play movies or TV shows with iTunes on your Mac, AirPlay Mirroring
will automatically switch to a full-screen AirPlay experience on your HDTV.
Encrypted streaming
AirPlay Mirroring uses encryption to securely send what’s on your Mac to your
Apple TV.
Audio support
With AirPlay Mirroring, audio from your Mac is wirelessly sent to your Apple
TV. You can use this feature independent of AirPlay Mirroring by selecting your
Apple TV in the Sound pane of System Preferences.
High performance
AirPlay Mirroring takes advantage of advanced hardware video encoding to
deliver high-definition mirroring efficiently and optimize processor use.
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