Can't log into to iCloud using authenticator - no pop up window
Hello, again, I can't log into iCloud on my MacBook Pro. It happened before, but I can't remember how the issue was resolved with your help. So I enter my password in the window and then I get the 6-digit number from two-factor authenticator. But I have nowhere to insert this number. The computer asks me again for my password and then I get the authenticator number again. and so around and around in circles. Actually the computer tells me to insert the password following by authenticator number. So I even tried inserting that IN THE SAME FIELD, but it obviously doesn't work.
Help please!
MacBook Pro 15″, OS X 10.10