Users are reporting that during the course of updating to macOS Big Sur, their machines are stuck displaying a black screen. Key reset combinations, including NVRAM, SMC, safe mode, and internet recovery, are all reportedly inaccessible after attempting to install the update, leaving no way to bypass the static black screen.
It appears that the overwhelming number of users experiencing problems are owners of the late 2013 and mid 2014 13-inch MacBook Pro, but it is unclear exactly how many users of these models have been affected. It is also of note that these are the oldest models supported by macOS Big Sur.
Yikes. That’s exactly the MacBook I have. I was very close yesterday to updating to Big Sur to see whether it might fix a longstanding issue. Very glad I didn’t.