i have a 2012 Mac Mini that has developed a serious problem. It is the I-7 version with 16 gigs of ram an a 500 gig ssd. It has started doing the beachball thing constantly, no matter what I’m doing on it. I checked the activity monitor and it is showing the kernal task as using over 400% of the cpu. I’m wondering what could be causing this? It has made this computer unusable. Thanks for any advice.