Ever since I updated to El Capitan, I have had 3 random shut downs, I will be in the middle of something, and it just shuts down. It was about 102-105 degrees F when the shut downs happened. I dont know what the problems is, it does seem to be running a little hotter since the update, and it quickly goes from between 77-80 degrees F at startup to 100+ in about 10-20 minutes of use. Even before the update gifs and video ads on websites would make the fans spin up loudly too. But now I am almost afraid to have websites open for fear of a shut down. I also notice after the El Capitan update that when the mini wakes from sleep, my wacom intuos 3 pen does not work for a few seconds, I will see the arrow pointer on the screen, but the pen is for a few moments paralyzed, and then it works. I have tried uninstalling and reinstalling the latest wacom drivers, but this does not seemed to have helped. I also tried to dust the mini off, with a little brush in the vents, i even tried to get the back off to see about any dust on the inside, but I could not screw the back off, it is on very tight.