I started to have troubles with really high CPU usage when I replaced my battery. I didn't buy an original Apple one and from the first boot I had issues with the kernel_task process. I managed to solve this on Yosemite by moving the plist file for my Mac model following this tutorial: How to fix kernel_task CPU usage on Yosemite worked perfectly!
Anybody knows a way to do this or where to find this file on Sierra? I can't find a IOPlatformPluginFamily.kext dir