I switched from using Jaws and Windows to using Voiceover and the Mac a few months ago. I updated to El Capitan soon after getting my first MacBook Air. I have noticed that my Air is very slow when loading webpages, or opening anything like system preferences. Also when I press a key, tab for example, there is a huge delay between the key being pressed and tab actually happening. This problem is not exclusive to tabbing. It doesn't matter what key I press. If my computer is completely shut down, and I turn it on, it's fine for a few minutes. But then it starts really slowing down. I don't expected to respond instantaneously to whatever I'm doing. However the delay of at least 30 seconds is obnoxious. Is this a bug? Is there some setting that needs to be turned on or off to improve my Air's overall performance? I'm really frustrated with my Air in general at the moment. Any assistance you can offer would be greatly appreciated.