I bought the brand new 2017 top of the line maxed out MacBook Pro. Safely migrated from my previous MBP. Had it running fine for days.
It was running normal through the night, actually sitting idle as I had NO apps running. So when I sat down to use it, I just figured, why not reboot it. I did. And all **** broke lose even though NO apps were running, no crashes took place, no peripherals were changed.
First, the MacBook Pro (latest macOS Sierra) got stuck in rebooting literally halfway on the progress bar, at the stage before the screen changes brightness and the touchbar comes to life. High fan RPM could be heard. I did not do anything and let it run for 30 minutes in case it was doing some housecleaning on the 2TB SSD. Nope. Nothing changed.
So I had to press the power button and shut it down. I unplugged my USB-C hubs and devices. I rebooted in Safe Mode. Yet the high CPU (an unbelieavable 3570% .,.. wow... the 4 cores must have reproduced and made an extended family overnight!)... I could barely get Activity Monitor to launch in that stage.
Finally, it is On, running, with only Safari (to type this post) Console running, but the fans have not stopped running high speed since reboot. This is truly a weird experience to have a 100% (or make that a $50000%) normal reboot turn into a nightmare. I will try NVRAM and SMC resets next. But I welcome any suggestions.
IMRAN