So using my lasses Mac while my PC is out of action, when you go on YouTube it warns the version of Mac is deprecated and is unable to play videos on twitter etc. When the videos are clicked, it just goes to a white screen.
I've looked on how to update the Mac version which is Apple Icon > System Preferences > Safari (and then go from there).
However when I go into System preferences, all the options are greyed out and it asks to sign in to Apple. I do that with her password, then it requests to verify where I'm signing from which I do by approving the sign-in from her phone.
It then provides a 6-digit passcode which I can apparently use to sign in properly. The Mac never actually presents a screen for me to enter the f***ing code though so I'm stuck in limbo. Any advice?