Aberdeen and Hearts are both keen and MacLean is set to seal a deal, but the player insists he does not want to move on loan.
"I would like to think it will be resolved, one way or another, by tomorrow at the latest," MacLean's agent Blair Morgan told the Plymouth Herald.
"But I don't know which way it will go. Steve doesn't want to go anywhere on loan. We have made that very clear to both clubs.
"He has got a young family and a house in Plymouth. If he's going to move to Scotland, he wants to get his career on track somewhere.
"He would like to resolve the issue as soon as possible.
"Aberdeen are certainly very keen to sign Steve, but we are still waiting to hear from Hearts.
"Basically, that's where we are at. We are just waiting to see what develops."
Newcastle 2/5, Draw 7/2, Plymouth 13/2