I am running a Macbook Air with Mountain Lion. The App Center shows a Thunderbolt 1.2 software update for RAW 4.06 compatibility is available. The laptop downloads the update and then tries to restart, but instead of restarting it just shuts down and I have to restart it manually. When I do, the update is not installed and it still shows as available. I have repeated the process several times with the same result. Is this a common issue with this update? Is it my Macbook? Any ideas how to resolve? Other software downloads seem to work fine.