Jose Mourinho clearly trusts the 21 year old and has praised him, exciting supporters who hope he can become a future United star.
"I had this situation with two or three players, discussing the opportunity that they might be able to come and play for Scotland".
England had attempted to beat Scotland to McTominay, and sources said the English FA was considering calling him up for next month's under-21 internationals against Romania and Ukraine.
McTominay is answering an emotional pull towards Scotland - his father is proudly Scottish - and he believes Scotland offer him the chance to carve out a significant worldwide career.
And Mourinho fuelled the fire of the worldwide allegiance debate last month when he said Scotland should pick McTominay "because it looks like England is missing him".
"It would have been easy, financially, to go in the England side and if you're in the Manchester United squad there's a good chance you'll get called up by England".
"Who will I support in the World Cup qualifiers?" He's probably realised the weight of playing for England and working every summer, he doesn't want that. He's a fantastic young player and it's great for us as a country. That's what struck me when I met him as a young player.
The academy product didn't seem to be a player capable of getting much game time this campaign due to his competition in midfield. "If he's got that, it'd be very hard for him to play for England".
Mourinho added: "I think the people around him are the right people".
"Going forward, it's up to Alex McLeish, I've not spoken to him yet but I'm sure I will do in the near future and see what the plans are".