The macOS Big Sur update causes some older MacBook pros to get stuck on a black screen during installation without users being able to find a fix. The problem seems to be most common in the late 2013 and mid-2014 models of the 13-inch MacBook Pro. Owners of other Macs have also reported problems installing Big Sur – and some say they have been able to fix them – but these two MacBook Pro models seem to have the worst problems yet.
The problems were noticed by MacRumors, who saw complaints about frozen laptops in his forums, on Reddit and on Apple’s support site. There is no clear indication of what could be causing the problem and simple ways to fix it ̵
Big Sur had an unusual number of startup problems. The high demand for the update seems to have slowed Apple’s servers to crawl, which has led to widespread slowdowns on newer Macs due to a little-known feature that checks with Apple that apps don’t have malware before each launch. Server problems also made it impossible for some users to install the update, and the operating system showed an installation error as people tried to start the installer.
Given the black screen issues that some users have had, the download issues may have been the best. If you are thinking of updating, it may be wise to give it a few weeks until the bugs are fixed. On the edge turned to Apple for comment.