Hello guys!
Anyone out there with high CPU usage issues by kernel_task when you have two monitors connected by Thunderbolt? CPU usage at 1300%. I have to shut down one monitor.
Have tested all the betas and the GM and nothing. In Yosemite works quiet.
My setup;
MacBookPro 15 Retina 2012
2.3 Core i7
16 GB RAM
2 monitors LG
For whom having external monitors, like I have 2, we also have to make sure external monitors are in good operating temperature too. My symptom was my Mac book was working great in the morning, but began to have this issue in the afternoon. This issue showed up very consistently after entering into summer here. Finally, my solution is to have one fan to cool down my external monitors so that I can continue my work in the afternoon without any problem now. Hope this can help people similar to my.