iMac early 2008 verification key

[Neslee]

Hello all

hope someone can help me here. I have an iMac early 2008 model. I thought I would do a clean up and erased everything. The OS is mountain lion. When I get to the part of logging into iCloud a verification code is sent to my mobile, however I can’t enter the on the iMac. The iMac is connected to the internet. What am I doing wrong? Is there a way around this?
Thanks in advance. Nes

 

[PaulD-UK]

From:https://discussions.apple.com/thread/8128795

"You may have to update your Mac to a newer firmware, however, I can understand if you don’t wish to do that.

On older devices, if you type in the Two-Factor Authenticaction Password/Code AFTER the Apple ID passcode, that how you use Two Factor Authentication on older devices.

e.g. Let‘s say your Apple ID Password is “Apple” and let’s say your Two-Factor Authentication Code is “199456”, then when you type in your password onto your older Mac, and it asks for two-factor authentication, you will type “Apple199456” as your password."