Maguire hobbled off with an ankle injury in last weekend’s 3-1 win at Aston Villa, putting his participation in the European showpiece in doubt.
United have lost both games since losing their captain to injury, going down 2-1 and 4-2 at home to Leicester City and Liverpool respectively, and Solskjaer is hopeful the former Hull City defender will be available to help the Red Devils end the season with silverware against the Spaniards.
Solskjaer said: “Hopefully we can have good news early, but I will give him as long as it takes because he has shown his importance. We’ve known it all along but maybe some people open their eyes more when he’s not playing.
“I certainly felt I became a very good player when I was injured. People suddenly realised what I could do as a sub or what I was as a player.
“Harry has been our leader, and our captain ever since he came in he’s been more or less ever present so of course he’s a big miss at the moment but, hopefully he’ll speed up the recovery and be ready for the final. I’ll give him as long as he needs until he says yes or no.
“He's making progress, but we've consciously taken the route of not testing him out too early, too quickly, because we don’t want to aggravate something.
“Harry is very – how do you say? - he wants this so much, so he doesn't want to take any risks either. When I spoke to him this morning, he was quite positive, which is good.
“Naturally, the day after it happened we were all down, but we saw early on or decided we have to focus, have to be positive and think that you're going to make it until you have to say 'no'. I've always been an optimist, so we're positive.”
