Apple's new mac OS system overturned, many users upgraded found that the equipment turned brick.
A large number of 13 inch MacBook Pro users in late 2013 and mid-2014 reported that,MacOS Big Sur failed to start after update. A large number of users reported this problem in a post on the macrumors forum, and similar problems were reported by reddit and Apple support community, indicating that the problem is common.
user reported that their machine was stuck to display black screen during the update to macOS Big Sur. Reportedly, after trying to install the update,Key reset combinations, including NVRAM, SMC, security mode and Internet recovery, cannot be accessed, and there is no way to bypass the static black screen.
Before that, many users complained that macOS Big Sur download process problems, resulting in the final failure to install. Many users feedback that the download upgrade process is very long, and there will be a sudden interruption, and must restart the device. There is also user feedback although can complete the download, but can not be installed.
Because of the number of users trying to download at the same time, there are some major problems with Apple's website. In addition to the download problem of Big Sur, Apple's developer website also went down during this period, resulting in some third-party applications unable to open.
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