Hello, I tried public beta on my iMac 2012. High Sierra is so slow that I can't even use it. Booting takes 2 minutes, opening stock apps takes around 30 seconds. Everything is so laggy, when I hit search field it takes few seconds until I can write into it. Im on El Capitan now and everything runs just perfect, my computer boots few second, opening apps is so fast that I cant even notice it. I know that its beta, but why is so slow? My computer has more power than some new Macs - Macbook, curent MacBook Air etc. Hows beta running on that computers?