I have a MacBook Air 2020 and have tried several times to update the OS from Catalina to Big Sur. Each time it gets to about 10" from completion and stops with the message "unable to verify mac OS". What's going on? Thanks!
MacBook Air (2020 or later)
How to upgrade to macOS Big Sur - source of following " If upgrading from macOS Sierra or later, your Mac needs 35.5GB of available storage to upgrade. If upgrading from an earlier release, your Mac needs up to 44.5GB of available storage. To upgrade from OS X Mountain Lion, first upgrade to OS X El Capitan, then upgrade to macOS Big Sur.
User wrote " unable to verify mac OS". This usually may means the Internet Connect failed or was interrupted during the download process.
To download Big Sur it requires a quick, stable and reliable Internet Connection - preferred method is via Ethernet Connection. If using Wifi - move computer as close to the Access Point / Router and disconnect all other devices connected to Wifi. Want the maximum bandwidth for the computer being upgraded to Big Sur.
unable to verify mac os
