I've been trying to connect my TV to my Macbook via HDMI cable so I can use it as a second monitor. Every time I connected it, when I check 'Activity Monitor' a task called 'kernel_task' shoots up to like 500% CPU, the fan starts spinning really fast and the whole laptop lags/freezes. The bottom of the laptop feels like it could melt glass.
I've tried a few things like:
- Different HDMI Cable
- Unchecking 'Automatic Graphics Switching'
- Resetting the NVRAM
None of these things have made a difference.
Details of my laptop are as follows:
MacBook Pro (Retina, Mid 2012)
Processor: 2.6 GHz Intel Core i7
Memory: 8 GB 1600 MHz DDR
Graphics: NVIDIA GeForce GT 650M 1024 MB Intel HD Graphics 4000 1536 MB
OS: Sierra 10.12.3
I have a much less powerful Windows laptop and it can be connected to the TV without any problems. I have also tried connecting when running Linux Distros and never experienced any issues. It appears to only be on this Macbook.
Any help or advice would be greatly appreciated.