yosemite apple id help
Hey everyone,
I have to update my macOS from yosemite (10.10.5) to something newer (thinking mojave). However, in order to download mojave I have to log in to app store. But I cannot log in to the appstore because the box to enter the 6 digit code for two factor authentication doesn't appear on yosemite! I am stuck in a vicious loop.
I can't turn off two step authentication either (there is no option to). Writing the 6 digit code in the same box as my password didn't work, too. Any help would be much much appreciated as this is important for my school work and I'm kinda running low on time. Many thanks in advance.
Cheers
MacBook Pro 15″, OS X 10.10