I inherited a Macmini A1176, after having alt/comm+R and erased the disk, then tried to reinstall over the net, I have made an App store account, now I can only get as far as entering id and password, (after getting a code which I input after password)? Now I can't get past 'This Apple ID has not been used with the App store'. I login into the app store - then what? thx.