OSX has some really odd lag issues with the UI and responsiveness. I'm running my lenovo win Win8 dual monitor on the 1377x768 & 2560x1440 external monitor and

OSX has some really odd lag issues with the UI and responsiveness. I'm running my lenovo win Win8 dual monitor on the 1377x768 & 2560x1440 external monitor and I don't see any UI lag. This is on an older Intel HD3000 integrated chip. My 13" MBP from the same time lags even if I'm using just the built in screen.