Okay, I shut the computer down while downloading and it seemed to stop. Hopefully it won’t try downloading again when I restart in future, I turned my internet off as well when I restarted just now. Will be more careful with pushing those buttons in future.
I am a bit hooped because I need those old projects but I also need to upgrade other software. Was trying to update garageband, but that wasn’t working with El Capitan. I’ve already lost my older version of Motion, and that sucks, but losing Final Cut Pro 7 is really not an option right now because I am still using some of the projects. Is the only solution to have 2 separate computers, one for the old system, one for the new?