macos_home_end_keys.json

{
  "description": "MacOS Change Home/End keys to Command + Left/Right Arrow (start/end of line)",
  "manipulators": [
    {
      "type": "basic",
      "from": {
        "key_code": "end",
        "modifiers": {
          "optional": ["any"]
        }
      },
      "to": [
        {
          "key_code": "right_arrow",
          "modifiers": ["left_command"]
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "end",
        "modifiers": {
          "mandatory": ["left_shift"],
          "optional": ["any"]
        }
      },
      "to": [
        {
          "key_code": "right_arrow",
          "modifiers": ["left_command", "left_shift"]
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "home",
        "modifiers": {
          "optional": ["any"]
        }
      },
      "to": [
        {
          "key_code": "left_arrow",
          "modifiers": ["left_command"]
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "home",
        "modifiers": {
          "mandatory": ["left_shift"],
          "optional": ["any"]
        }
      },
      "to": [
        {
          "key_code": "left_arrow",
          "modifiers": ["left_command", "left_shift"]
        }
      ]
    }
  ]
}

This configuration solves the common issue for Linux and Windows users who are accustomed to the Home and End keys moving the cursor to the beginning and end of the current line, respectively. On macOS, by default, these keys move the cursor to the start or end of the entire document, which can disrupt editing habits. The following Karabiner-Elements rule remaps Home and End to behave like on PC.

1.	Open Karabiner-Elements.
2.	Go to the “Complex Modifications” tab.
3.	Click “Add Rule”.