It's coming out now that Mack is saying he wont resign. So if Texas wants a new coach, they will have to fire him. That being said, you dont quit a job unless you have one lined up, Likewise you dont fire a coach unless you :think you: have one lined up.
If Texas fires Mack, they have a good feeling they will land a coach they want. But if not Saban, then who? Who else would they be looking at? Who else is worth firing Mack, over?
We will see if Mack indeed gets fired. I somehow doubt Texas makes a coaching change this year, not enough available talent to justify.