Solved Kernel Task Greater Than 100 Imac Intel 21 5 Emc 2638
Chosen Solution I upgraded my memory to 16GB and now the fan runs constantly and the kernel_task is greater than 100%. The screen no longer works and I may have damaged the screen connector, so I am using an external monitor. Needless to say, my upgraded machine is much slower than when it was 8GB. Update (10/18/2021) Thanks for the answer. Unfortunately my display connector seems to be damaged. Ouch! From the frying pan into the fire....