I’m installing Big Sur on my 2015 MacBook Air but the status bar below the Apple logo on the black screen has been stuck at 35ish % (it doesn’t show progress in percent) for over an hour now. Prior to that it was moving quite quickly and blew through about 5 different status bars. Though downloading the files took less than 10 minutes. Not sure what’s happening. Anyone else experiencing this? For me it an update has never taken this long.
After talking with an Apple senior advisor I was informed to simply restart the computer. He said there was an issue with the progress bar not completing therefore not continuing the process of restarting the Mac. After I shut down the Mac and restarted it with the power button it instantly came on and allowed me to login with the update already installed!