I have same issue with 2015 retina MBP. I have a 27” Thunderbolt Display connected and plagued by kernel task eating up CPU. I’ve tried resetting NVRAM and SMC. I’ve had a new battery installed, had fans and vents cleaned out, new thermal paste applied. And STILL I get the issue. The laptop works just fine when not connected to the display. It’s clearly a problem with the display but can’t seem to resolve the problem. For an expensive display it’s really unacceptable that I can’t even use it with my Apple computer. Don’t know if anyone has any other ideas???
Crankinhaus66
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