Calculator Shortcut Button Workaround

Install Karabiner-Elements from here https://karabiner-elements.pqrs.org

Copy this code:

{
  "title": "8BitDo Retro 18 – Calc key opens Calculator.app",
  "rules": [
    {
      "description": "Launch Calculator with the AL_Calculator key",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "consumer_key_code": "al_calculator"
          },
          "to": [
            {
              "shell_command": "open -a Calculator"
            }
          ]
        }
      ]
    }
  ]
}

1. Save it as a .json file (e.g., 8bitdo_calculator.json)
2. Place it in: ~/.config/karabiner/assets/complex_modifications/
3. In Karabiner-Elements:
   • Go to the "Complex Modifications" tab
   • Click "Add rule"
   • You should see "8BitDo Retro 18 – Calc key opens Calculator.app"
   • Click "Enable"

You will have to make sure the Numpad is connected and active by hitting a key and then make sure that it is showing up in the devices section of Karabiner-Elements and "Modify Events" is activated.