I'm going to assume that many of you have not read the technical reason as to why they disabled it on older Macs and why it's not going to be something easy for the community to change. There is in fact a hardware difference between the machines/devices that can do this and those that can't.
In short there is a hardware H.264 encoder chip built into newer machines. Rather than write the code to render the video on the CPU side they simply use the calls to the hardware chip which is faster, easier and more battery/power efficent. So this is why old machines won't support it - the code to do this does not exist.
Ah, but wait - there's AirParrot that can do this. That's because those guys wrote the code to render the stream before sending it to AirPlay - they essentially built what the hardware is doing for Apple.
Where Apple has totally screwed up here is in 2 ways - first the obvious that they promised a feature that they knew they could deliever to only the smallest percentage fo owners. They know their customers (I am not one) - they know many of you guys will ***** but at the end of the day you'll upgrade and give them the cash. The second is that they could have written this into the software in such a way that older machines would be able to support it but it would be more intensive on them. AirParrot has clearly proven this a viable option but as we all know Apple is the most controlling technology company on the planet. As they can't guarentee a great experience they won't do anything. Some call this good - most walets call it bad.
This is the same reason(s) that Siri isn't on the iPhone 4 (and only the 4S). At the end of the day it won't matter - yes, we're all right. Yes this is shameful. You guys are forgetting that Apple is an evil corporation. They make great products but they care about the bottom line first and consumers second (as they really sorta should).
I hope this gets some mainstream tech press but I doubt it will. The weathly market that Apple has will just buy new machines - those that can't will ***** and then buy AirParrot. Neither will remember this 2 years from now, other than "man, you shoulda read this tread I saw one time...."
Time to unsubscribe - I've rarely seen a thread grow so quickly.