Chosen Solution
I recently wiped my partition to give this laptop to my dad after I received a mid 2012 MacBook Pro, I had been able to wipe my partition and install a given OS such as Sierra and High Sierra without issue and for some reason while trying to install El Cap it just won’t work. I’ve tried to put the correct date in terminal, sign into iCloud with the given account, attempted to use internet recovery mode (not supported on 2009 models but it was worth a shot). Does anyone have a solution to this? Thank you!
Take a look at the date of the installer. Go to date and time, uncheck the automatic Apple time update. Reset the date to a month after the installer date and try the installation again.
