I have a Macbook air and the fan is almost constantly running at full speed, while the CPU cores are in the 90-100 degree range. Apart from the fan becoming annoying, I am afraid of damaging some component with all this activity going on? This behaviour is quite new, I used it for months before this started and it wasn't like this, it only went on full fan occasionally during some operation like exporting a screencast. Any things I can try to fix it? Activity monitor shows kextd running at 90-95 CPU usage most of the time, while MailPlane, Chrome and InsomniaX are the biggest memory hogs. Specs attached.