Presuming you mean a Maclaren stroller and not a Macintosh laptop, the answer is no. I'm not sure of the exact size, but my guess is that they are about 12" wide x 16" high by 20" deep.
The best thing to do with a stroller when you are not going to use it for awhile is to place it in a (covered, if possible) designated stroller parking area with the wheels locked together. That way no one will move it and you won't have to worry about it being taken if someone sees it there for an extended period of time and presumes it is abandoned. Naturally, you can't leave a personal stroller in a park overnight; the night crew sends them to L&F.