Whatever the internet connection problem is, it can potentially lead to a stuck installation error during your update. Your Wi-Fi connection might also be too slow to keep up.
If you’re using your phone as a Wi-Fi hotspot and downloading over your phone’s cellular data, expect an error if your data gets exhausted in the process.
Mac updates are downloaded over an internet connection, and they’re typically large (MacOS Big Sur is about 12GB in size). It is good, however, to know what the culprit is, and that is what this section exists to explain.
There are a couple of reasons why your Mac update might be stuck during installation, and they’re mostly not your fault.
