Was just on tour trying to redownload the factory Laser Mammoth presets over usb. Using a Macbook pro 2017 15 inch with the usual USB C adaptor Rainmaker would not recognize USB being connected and neither Laser Mammoth or Sysex Librarian could see the Rainmaker.
FWIW I do not have the latest Rainmaker firmware as I don’t have a PC to do the update but otherwise it works fine.