Flashing: MacOS

• Recent versions of MacOS X already include needed CH340 USB Serial drivers. If for some reason you MacOS X version doesn't have those, you will need to install CH340 USB Serial drivers.
  • CH340 MacOS X vendor driver available from here
• Install avrdude:

  brew install avrdude
  

• Using avrdude:

  avrdude -v -p atmega1284p -c arduino -b 115200 -D -P /dev/cu.usbserial -U flash:w:Anycubic-Mega-Zero-firmware.hex:i
  

  Notes:
  • Replace /dev/cu.usbserial with your actual name of USB-Serial port where printer is attached
  • Replace Anycubic-Mega-Zero-firmware.hex if you have different firmware filename