I cannot find where to get my two factor authentication verification code from in settings on the Mac, neither is there any input field for me to type in the code. What do I do?
You need to be running El Capitan or later.
If your Mac can run Yosemite, it can run El Capitan.
Unfortunately I need the 2-factor authentication to get the upgrade to El Capitan or higher - nice feature, I guess I better install Windows ...