I have had a pretty long-term relationship with a client. We develop medical applications and part of our arrangement is that they lent me a dedicated computer to use for all the work I do with them.
This has worked out well, but recently I upgraded the operating system and it's now bugging me about using Multi-Factor Authentication.
From a security standpoint it seems like a good idea, but I'm not sure I want to put my personal phone number into this machine to use when authenticating. It's a Mac and the apple ID on the machine has been set up as "email@example.com" and nothing on it is in my name.
Has anyone dealt with a situation like this? What's the best way to handle this?