In OS X Mountain Lion Apple implemented the option to do AirPlay Mirroring from a Mac to a TV using an Apple TV. This function should work on any Mac, but it seems that only Macs released in 2011 can use it, the rest not having access to them. You're probably wondering why your Mac bought in 2010 can't run AirPlay Mirroring since the hardware specifications make it unquestionably compatible. Well, the answer is also simple could be related with Intel Insider technology that protects the copyrights of digital content creators.
My best guess is that these Macs ship with Intel chips containing the latest and greatest version of Intel Insider, which allows streamed DRM encrypted Hollywood content to play — just guessing…
This technology was implemented in the Sandy Bridge series processors that were included in Macs released in 2011. With the help of Intel Insider, users can stream multimedia content purchased from iTunes or the Internet, but streaming for a certain pirated content could prove to be difficult. Practically, the technology protects the films made in Hollywood against piracy, but of course there are methods by which these protection measures can be extremely easily overcome, and after the release of OS X Mountain Lion, various applications will be available that will change the compatibility of AirPlay Mirroring.
