If I boot into windows, videos play smooth as silk and flash games have a really nice framerate and are run perfectly. in osx 10.6.8 this is not the case. any fullscreen video I try to play (even content that was downloaded and not streamed) is choppy. flash is choppy. it seems like the performance in snow leopard is worse than windows. any idea why? I don't remember it always being this way. I KNOW when I first got my imac it could handle this stuff with no problem. specs: imac spring 2009 Core 2 duo 8GB ram (DDR3) GeForce 9400 GPU I am really sad about this lately. I don't any money to buy a new imac. I just want it to work like it did when I purchased it. Has anyone had a similar thing happen? Is there anything I could do to improve performance? Would upgrading to Lion help or would it put even more strain on my system?