I use my MacBook Pro outdoors on the job. For a significant portion of the year, the ambient temperatures here are in the 90-110 range.
While outdoors on the job (but at no other time), I have been having a problem where the machine bogs down to an absolute crawl. The reason is kernel_task eating up the entire CPU (450%+). At first I thought this was a mal-interaction between Mac OS and Windows under Parallels, but after a year of this problem, I believe I have correlated it with high ambient temperatures. Quitting all apps makes no difference. Rebooting either makes no difference or makes a difference only for a very brief interval. Upgrading the OS from Yosemite to Sierra made no difference. The problem is more likely to occur later in the day than earlier, and when the computer has been in use for a while versus when I first unsleep it. When I return to the (air-conditioned) office and unsleep the computer, the problem is gone. I've tried examining Console while the problem is occurring, but I see nothing obvious in the logs (which, of course, I can only examine at a snail's pace anyway), and the Sierra Console sucks much harder than previous versions. Has anybody heard about a failure like this? Does anybody know offhand why heat would cause this behavior? Can anybody tell me how to find out what kernel_task thinks it's doing when it's looping all to hell? _______________________________________________ MacOSX-talk mailing list [email protected] http://www.omnigroup.com/mailman/listinfo/macosx-talk
