"Download failed: An error occurred while downloading the selected updates. Please check your internet connection and try again."
MacBook Pro M1 2021
UPDATE* Tried safe mode, no luck. Tried changing wifi from router to iPhone link (as another user suggested worked for them) and no luck...same stupid lying message about checking my internet connection.
Same issue- brand new iMac with the M1 chip and out of the box storage available (like +800G) and high speed internet. Says 2-4 days to download 12GB and fails. Not sure what the deal is but on second try now (2 days) and will call store if it still doesn't work or there's no good answer here. Sort of underwhelmed by this issue given my expectations for Apple.
This sort of problem arises, when the System Analyser had less knowledge of about third-world countries and IT system in those countries. Such stupids are mostly from rich family, from USA or UK, studied in Harvard or similar rich Universities and then joined Apple or Microsoft. In recent years, Windows also following path of macOS, and setting lots of obstacle for users worldwide.