New to this site.
2013 MacBook Air refurbished from IBM in 2017.
Factory reset accidentally to original software: mountain lion.
Could update 6 items. the last iTunes update comes with an error code.
Downloaded OS software on my iPhone, from my iPad, and also from a 2013 Windows 8.1. Placed on USB and SD card bootable drive but MacBook cannot download this new software.
I need to get my MacBook up and running and I need help. Downloaded many different versions of macOS from Mountain lion to Big Sur.
Absolutely need this fixed.