I've owned my iMac for nearly 3 years now and it has never failed me, it's honestly the best computer I've ever owned, it simply works all the time. However flash seems to run quite laggy on it, especially in firefox. When watching HD videos on Vimeo it stutters quite a bit. I've made sure I'm running the newest version of flash. Does anyone else have this issue? I tried searching but not much came up.