I have a 13" 2010 MBA with a 1.86 Core 2 Duo processor and 4 GB RAM and 128 GB SSD (used 60GB) that seems to be on its last legs. Everything has gotten slow - web scrolling lags and misses frames, switching between apps using Expose stutters, it takes 10 seconds after wake up before the computer responds to any inputs, I see more and more spinning discs everyday...the list goes on. The only thing it still does well is shut down in less than 5 seconds and boot up in less than 15 seconds. Just wondering if anybody has tried using Mavericks on a 2010 MBA? Could it breathe a new lease of life int my machine, seeing as how the new OS is supposed to optimize memory, battery life etc.?