Today I pulled down a live site to local that needed a theme update (Enfold) - I wanted to test things before I did it on live. Enfold is a theme that needs a themeforest.net username and API number to update - so I put in my credentials, hit update - and bam: Black Screen and then the classic white writing before reboot.
I thought it might be a coincidence, so I tried it again (I know, I know - not very smart.) Same exact thing.
After that - I just dropped the updated theme in there manually - and that worked OK.
So - things seem to be running fine after the fact, but it does worry me - that the error (whatever it was) was so big - that it immediately shut down my computer. That has not happened any other time since I have owned this computer (MacBook Pro 15).
Thanks for following up. I haven’t run into any issue with it lately - but I also have done any major theme updates. I definitely was able to do some plugin updates. Consider this closed for now - I think everything is fixed.