hi,

if your mac is a new one or a couple of years old, and the kernel-task needs 300-600% ,and it is nearly impossible to work with your Mac …

maybe this can help you to get back an propper computer :

http://blog.viktorpetersson.com/post/100148585299/how-to-fix-kerneltask-cpu-usage-on-yosemite

if you have trouble to figure out the right model ident (MacBookPro9,1/i7-3720Q) or something like that, go to https://browser.primatelabs.com.

Download Geekbench 3, start it and check the results

————————————————————————————————————————————
MOTHERBOARD Apple Inc. Mac-06F11F11946D27C5 MacBookPro11,5
————————————————————————————————————————————
important is this ID : 06F11F11946D27C5



but first of all read the link from „viktorpetersson“



this works for me

 

Last edited: Mar 25, 2016

Hello, Her Hans Wurst

The point (at least how I got it from your message) is that your are not satisfied with you Mach 3 Kernel sold by Apple ...

Now, since Mac OS X, is based on open-source, Berkeley UNIX (Mach 3), you can get the sources, optimize the configuration and then rebuild the damn thing!

Or sue Apple that they sold you bad stuff (in case you you are off charts on the idea of building a UNIX/Linux/Mac kernel)