I'm installing El Capitan on my MacBook Pro (mid 2012) from bootable USB.
The original OS of my Mac is Lion and the latest OS is High Sierra, so I created a bootable flash drive for El-Capitan.
The installation process asks me to enter an Apple ID.If I I enter it correctly dialog close and nothing happens!
I enter wrong Apple ID to check whether my internet connection is ok or not and does it really check my password or not. When I enter my password wrong it prompts me, so the Internet connection is OK.
I searched a lot but found nothing, what should I do?