2017 Intel iMac intake air vents clogged
My 2017 iMac kept running hot. I shut it down and blew some dust out of the exhaust vents with compressed air. I used a small brush on the intake vents along the bottom of the screen, then blow it out and was really surprised to see chunks of dust come out. There were even a few pieces of insulation that must have been sucked up from a home improvement project a while ago. This is just a reminder to check both intake and exhaust vents for blockage.