So, I tried to install newly purchased iPhone 5 and after logging into my apple ID account, a pop up message notified me that a verification code has been sent to macOS Sierra, where can I access the code on my laptop? Furthermore I cannot now even verify the account because it is impermanently blocked as I tried too many times to enter a password for my Apple ID. Now I remembered it btw. So, to reset the apple ID password they ask me to enter a password for my macbook AIR, I am very sure of the password because I use the laptop every day, but when I enter the MacBook password the pop up message gives me an error and notes, that the entered password is incorrect. Do I even understand correctly that I need to enter the password which I enter when try to log into my computer, is there any other password am not aware of?
Now I manage to log into the phone and install different apple ID, but I have a problem to reactivate the old apple ID on my mac and also the phone, because on both devices they ask to verify the code sent to the other device, which I cannot access.