trying to restore an iphone8 or erase to original settings without passcode
My daughter forgot her passcode months ago, and we are trying now to restore her iphone 8. I am on an old desktop 10.11.6 OS X El Capitan. It goes all the way through to the Apple icon, and then it tells me there is an error 10 and cant be restored. Is it because computer is so old? Can I take it into apple?
iPhone 8, iOS 12