iMac Two step authentication

I have an iMac which my uncle (which im in no good relations with anymore and which moved away) used but was bought by my aunt and I used it too. Now the thing is he enable two step authentication remotely. Is there any way I can bypass it. A program or any other methods if anyone can help please do so. Thanks!

hi! only way to bypass it is to get your uncle's iphone so you can do the 2fa on his phone. sadly, thats the only way or reformat the whole mac.