okay so some of us might know the show fosters home for imaginary friends it was on cartoon network it ended in 2009 but I have a theory that mac has schizophrenia it might be because he didnt have any friends when he was a little kid and the fosters home for imaginary friends house was in macs mind kinda same with the other imaginary friends same with bloo but then when the show ended the schizophrenia probably stopped which meant that the house and the other imaginary friends disappeared but then he thought everything he saw was real but he was talking to no one and the house wasnt real so all of this was in macs mind or the house was a aslylum.