Logging back into the App Store can sometimes fix issues with Big Sur not downloading correctly. Log out of the App Store and log back in. We are aware of an issue affecting users on macOS 11.4 Big Sur and higher, which prevents device drivers from loading. If you’ve tried all the steps above and your MacBook Pro is still stuck on a black screen, or macOS Big Sur won’t install at all, Apple recommends that you contact Apple Support for further assistance. If you have any macOS Big Sur update problems, here are the possible fixes: 1. If macOS Big Sur has only partially downloaded before failing, look for the Install macOS 11 file on your hard drive, delete it then try downloading it again. Keep holding down all four keys for about 20 seconds until you hear the startup sound, or until the Apple logo has appeared and disappeared twice.Turn on your Mac, then immediately hold down the Option, Command, P and R keys.If the issue persists, reset NVRAM and PRAM as follows:. Check the live status of the servers to check the issue isnt with Apple. Wait a few seconds, then press the power button to turn on your Mac. If theyre down, you cant install Big Sur, no matter what you do on your end.Keep holding all four keys for another seven seconds, then release them.Apple has apparently acknowledged the issue. Keep holding all three keys for seven seconds, then press and hold the power button as well. For those wanting to download and install the company’s major update for Macs titled macOS Big Sur, they’re experiencing problems with that too.On your keyboard, press and hold Control, Option and the right Shift key.Shut down your Mac by holding down the power button until it turns off.If the issue persists, reset the SMC as follows: The problems appear to have started with the macOS Big Sur 11.1 update, and the 11.2 update has not provided a fix and in some cases, has worsened the issue.Unplug all external devices from your Mac, including any displays, USB accessories, and SDXC memory cards.Press and hold the power button on your Mac for at least 10 seconds, then release.These are the steps you should follow if the macOS installer says Big Sur cannot be installed, or if your Mac starts up with a blank screen:
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