

As noted by project manager Thibault Imbert, Adobe's Flash Player 10.1 for Mac has been updated to enable hardware-accelerated decoding of video content, offering smoother playback, lower system resource usage, and longer battery life for portable devices.
Adobe released Flash Player 10.1 in June, but did not include hardware acceleration for the Mac OS X platform in that release. Users willing to run a beta version of Flash Player have, however, been able to access the feature with a pair of "Gala" preview releases pushed out over the past several months.We just pushed a few minutes ago a new version of the Flash Player 10.1.82.76 containing a nice feature that was in beta until now called "Gala". Yes, H.264 GPU decoding in Mac OSX is now officially enabled in the Flash Player.
You should notice now a nice difference when playing H.264 content on your Mac in terms of CPU usage. We rarely enable new features in security releases but we really wanted to enable such a cool feature.
According to Adobe, hardware acceleration is supported on the following models:
The new version of Flash Player is available through Adobe's download site.- MacBooks shipped after January 21st, 2009
- Mac Minis shipped after March 3rd, 2009
- MacBook Pros shipped after October 14th, 2008
- iMacs which shipped after the first quarter of 2009
Article Link: Adobe Enables Mac Hardware-Accelerated Decoding in Updated Flash Player 10.1