Can not update my Macbook Pro 13" Retina Late 2013 Laptop to Big Sur even though I had been running it on this computer for 3 weeks before reformatting.
I was running Big Sur on my Macbook Pro 13" Retina Late 2013 Laptop for about 3 weeks and it was running great. We decided to reformat this older Magbook Pro for my daughter. Once reformatted it will not let us upgrade back to Big Sur. What is up?
MacBook Pro 13″, macOS 11.0