According to MLB rules
When running the last half of the way to first base while the ball is being fielded in the vicinity of first, a baserunner must stay within the three-foot runner's lane to the right of the foul line unless they are avoiding a player fielding a batted ball. If the umpire determines that the baserunner has interfered with the player taking the throw at first base by running to the left of the foul line or to the right of the runner's lane, the baserunner can be called for interference.
Mcguire was on the left side running through first base. He needed to be in the RIGHT side.
Therefor correct call.