iMac mid 2011 T2 secondary heatsink heating up
This is not a problem. I have a 2010 iMac with an HDD and I have Temperature Gauge 4.1. It reports the temperature at 14 different locations in my iMac. My computer is basically idling right now. 9 of the 14 locations have a temperature that is over 60°C, with the Power Supply Heatsink reporting 75°C. The locations that are not reporting temperatures over 60°C are at 55-59°C. So 60°C is not a problem. The Average CPU temperature on my machine is reported as 59°C. One fan is maxed out and another almost maxed out. This is normal for my older iMac. The left side of my iMac also gets very hot to the touch.