BigSur installation failure

philipfromwarsaw wrote:

Cause of " macOS Big Sur installation failed"? Platform: 2018 MacBook Pro running Catalina 10.15.7

Verify available storage space.

Big Sur states that you will need 35.5 GB of free storage when upgrading from High Sierra or newer, and 44.5 GB when upgrading from an older versions.

Big Sur macOS 11.0.1

https://support.apple.com/macos

If no resolve try launching the installer while you are in SafeBoot Mode

SafeBoot https://support.apple.com/en-us/HT201262

if you downloaded successfully the full installer it will be sitting in your

~/Applications/ "Install macOS Big Sur.app"