What if kernel_task is "on" or "working" much of the time AND the temperatures of my Macbook Air (mid-2012) is running "hot", e.g., 145-182 degrees F.?
MacBook Air 13", macOS 10.13
See if you can perform the following two tasks to address your concern-
If none of the above works then have your Macbook examined at an Apple Store.
Axel F.
Familiarize yourself with If kernel_task is using a large percentage of your Mac CPU. There are additional links within it that explain its function in extensive detail.
The kernel_task process is constantly running and the the temperatures you describe are perfectly normal.
What if kernel_task is "on" or "working" much of the time AND the temperatures of my Macbook Air (mid-2012) is running "hot", e.g., 145-182 degrees F.?
