This is actually so annoying, it used to happen all the time I turned on my computer, but now it doesn't happen anymore.
I think someone updated it, but it's not likely since I don't think anyone in my FAM would actually take the time to wait.
Yeah, I don't have a Mac but it does happen for me. It usually builds up and I just update it if I know I will be gone for long enough for it to update while I'm gone.