This is a fact, Flash performes not perfectly on Mac, but why ?. Tinic Uro, senior computer scientist on the Flash Player team describes accurately the reason and the new joint effort of Adobe and Apple to speed up Flash using Core Animation, a low level Objective-C framework. The final public release of FP 10.1 for Mac should leverage such technology to address this “legendary” issue.
Why is Flash so slow on Mac ? Tinic explains
Published
Video Encoding & Streaming Technologies 
An interesting insight from two former Adobe mobile engineers (lead architects for Flash Lite) could help understand why Apple is not supporting Flash on its mobile platform.
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http://www.wired.com/gadgetlab/2010/04/adobe-flash-jobs/
Carlos Icaza and Walter Luh, former Adobe mobile engineers, said they were raising flags at Adobe in 2007 about the same complaints that Jobs detailed Thursday.
“Walter and I, being the lead architects for Flash Lite, we were seeing the iPhone touch devices coming out, and we kept saying ‘Hey, this is coming along,’” Icaza said in a phone interview. “You have this white elephant that everybody ignored. Half the [Adobe] mobile business unit was carrying iPhones, and yet the management team wasn’t doing anything about it.”
Icaza and Luh have a vested interest in this dispute: After leaving Adobe, they launched a startup, Ansca Mobile, which produces a cross-platform solution called Corona that competes with Flash.
They said they left Adobe because executives did not take the iPhone seriously when Apple announced the touchscreen device in 2007. Instead, Adobe focused on feature phones (cellphones with lightweight web features, not smartphones) and invested in development of Flash Lite to play Flash videos on such devices. Subsequently, Adobe shut down the mobile business unit in 2007, and has suffered from a brain drain in the mobility space ever since, Icaza and Luh said.
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