HT201343: Use AirPlay to display video from your Mac on an HDTV
Learn about Use AirPlay to display video from your Mac on an HDTV
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Helpful answers
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Apr 23, 2014 8:08 AM in response to ermerby diesel vdub,As clearly stated in the article from which the thread was started, your computer does not meet the requirements for AirPlay mirroring. If that's a feature you want, buy a new(er) computer that does meet the requirements.
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Apr 23, 2014 8:24 AM in response to ermerby Rudegar,airplay works by the video card (gpu) support in hardware making what is shown on your screen into a H.264 video stream and sending it across the the network to be displayed on the reciever
your video card does not support that because it's older
there is a program called airparrot who does it not by using the video card but by using the cpu (central proccessing unit) but that can cause performance issues and the cpu overhead is bigger