So apparently on Macs the library folder is set to hidden by default. I tried what you were saying before, but thought it must not be creating the file because there are also other library folders on the Mac. Super confusing. But when I typed start-1.json into the finder it showed the location of the file and a greyed out library folder.
Thanks for your help, I just need to delete that file, but thought it wasn't creating it in the first place.