Hey there! So, a Macintosh user group is basically a bunch of people who really like Apple computers and they get together to talk about them and help each other out.
Think of it like a group of friends who all have the same kind of toy and they like to play with it together. Except the toy in this case is a computer!
These people might meet up in person, like at a library or community center, or they might talk to each other online. They might share tips and tricks on how to use their Apple computers better, or they might help each other fix any problems they're having.
It's kind of like having a big family of people who all have something in common – a love for their Macintosh computers!