Mac - iCloud Two Factor Authentication Code Input
When authenticating to manage my iCloud account from my Mac the device accepts the entered password and, as expected, requests the input of the authentication code sent to my mobile device. The code is received but the Mac does not present any input interface for the code itself. It indicates , 'Enter your password followed by the code sent to your trusted device', but if the code is added to the password the Mac indicates (as expected) that the password is incorrect. There is no additional screen input field for the code itself.
Has anybody else experienced this?
Many thanks.
iMac, OS X Mavericks (10.9.5)