Mac SMC Reset: Something That Might Help if Your MacBook Air Does Not Boot

I had a bit of scare while trying to download the iOS 4.2 update for my iPad yesterday. The MacBook Air I was using to get the update crashed during the long download process and would not turn back on. After fussing a bit with the Air’s power button, I was just about to make an appointment at a nearby Apple Store Genius Bar when I remembered that Macs have a couple of keyboard gymnastics that can force a boot.