Sunderland manager David Moyes worked with the pair when at Old Trafford but did not give either their debuts with the club.
McNair has made 27 appearances for United and also has 11 caps for Northern Ireland.
Donald Love has made just two first-team appearances for United and also played eight times while on loan at Wigan last season.
Moyes is still said to be interested in the pair's team-mates Adnan Januzaj and Marouane Fellaini.