The new MacOS Big Sur is Covering up some older MacBook Pro versions.

Key Points:

• Apple launched the newest macOS update, the Big Sur, and since then, the story has not exactly been very smooth.
• Users say that their computers get stuck displaying a black screen during the upgrade process to the macOS Big Sur.
• According to sources, key reset combinations, including NVRAM, SMC, safe mode as well as internet recovery, are all unreachable.
• It is safer for MacBook Pro owners with older models to stay away from the latest update until it is transparent as to why this happens.

According to the complaints, users say that their computers get stuck displaying a black screen during the upgrade process to the macOS Big Sur. (From Apple).

The new macOS update: 

Last Thursday, Apple launched the newest macOS update, the Big Sur, and since then, the story has not exactly been very smooth. A significant number of older MacBook Pro users have confirmed that the Big Sur update is bricking up their computers, late 2013, 2014 13-inch MacBook Pro.

The MacRumours forum:

The MacRumours forum thread has a reasonably large number of users mentioning this Problem and users on Reddit, and Apple Support Communities have also posted similar complaints suggesting that this Problem was widespread.

As per the complaints by users: 

According to the complaints, users say that their computers get stuck displaying a black screen during the upgrade process to the macOS Big Sur.

According to sources, key reset combinations, including NVRAM, SMC, safe mode as well as internet recovery, are all unreachable. This leaves no way for users to circumvent the static black screen they are dealing with immediately after attempting to install the update.

Old MacBook holders facing this Problem: 

It looks like those who own older MacBooks, especially the late 2013 and 2014 13-inch MacBook Pro models are a huge number of users facing this Problem.

However, precisely how many consumers of those models have been impacted is not clear. Also, these are the oldest Big Sur-supported MacBook models.

One Reddit user noted:

One Reddit user noted that they were advised to book their MacBook Pro for repairs by Apple support and another user on the Apple The support thread said that the Problem was escalated to the Apple technical team so that Apple is aware of the issue in all probability. It is safer for MacBook Pro owners with older models to stay away from the latest update until it is transparent as to why this happens.