New 27" iMac -- Slow Flash Video

have you tried a different browser?
just a thought

I'm having the same problem. I also use Firefox and whenever I try to play video it is very (very) jaggy and full of lag.

Also, the browser seems to be less responsive, and slower, than it should be.

I have last year's model white Macbook, recently updated with Snow Leopard, and am not seeing the same issues.

Not a long term solution but hitting the power button to sleep the computer, and then turning it on again fixes the issue short term.

I thought the 27" model was to go on sale during November? You couldn't of gotten it this fast by mail and if not supposed to be sold till November, how did you get it?

Thats for the quad core i7. The non quad core is available now.

I'm having the same problem with my 27" iMac. I had a group of friend in showing off a funny YouTube video and the video couldn't stay in sync with the audio. I've also been trying to watch content on Hulu and having the same problem. I've upgraded from an original 1.8GHz PowerMac G5 (like 6 years old) and that does a better job. I'm really not happy. Overall the machine is beautiful and the display rocks, but if it can't play streaming video smoothly, what's the point?

I have the same exact problem. Brand new 27" and it seems that it chugs in other places like photoshop and just doing general tasks - more than it should for being new.

has anyone contacted apple directly?

Checking around some other forums it seems like this is a common issue.

It seems like the default system in Snow Leopard is to blame. In every case the problem was fixed with doing a clean install of Snow Leopard.

I had the same problem. Try doing the following steps. That is what I had to do on my new 27 inch Imac. This is what they had me do when I called Apple Support. It fixed my problem. Now it runs great.

PRAM & SMC resets
1. From the Apple menu, choose Shut Down (or if the computer is not responding, hold the power button until it turns off).
2. Unplug all cables from the computer, including the power cord and any display cables.
3. Wait at least 15 seconds.
4. Plug the power cord back in, making sure the power button is not being pressed at the time. Then reconnect your keyboard and mouse to the computer.
5. Press the power button on the back to start up your computer.

Resetting PRAM and NVRAM
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

Sometimes this has happened to me depending on what programs i am running int the background. But to tell you the truth, it only happens when i am using safari. Firefox runs smooth every time when i view any type of video

I can confirm reinstalling snow leopard does not fix this issue 😟 Anything the applecare guys tell you to do will involve a system restart, which will temporarily fix the problem until the hard drive spins down (after about 15 - 30 mins for me) so you may think its fixed on the phone with them, and then it'll pop up again later.

This has seemed to help a few people regarding safari's speed and video playing problems. But when i played with my network settings it just screwed up my ability to connect to the internet. I guess give it a try, i just downloaded firefox and all my video works fine.

http://discussions.apple.com/message.jspa?messageID=9987966#9987966