Hello there!

I'm using a imac 20" with the 9400m. But I'm having issues with lags in expose. When I use the functions, all windows for instance, the animation is lag, BUT, when I keep doing it, over and over again, suddenly it gets smooth!!! I compare with another imac, with radeon here (an old edition) and there is no lag, even when you shoot the "all windows" command for the first time.

I suspect the gpu is under the normal frequency when idle, then when I do the all windows over and over the frequency is increased then the lag goes away.

What can I do for fix it? Overclock to the normal frequency the gpu? if yes, how can I do that?

10.5.8 here, tested with the snow too, same problems.

thanks

welcome you, your problems are due to the operating system you are using is too old then. Therefore it makes you uncomfortable, especially when using it at work. This solution you can decide by installing the system.