Karabiner-Elements Complex Modifications

Hardly any software uses a combination of 4 modifier keys (shift + control + option + command) for a shortcut, and it's hard to press all 4 keys at the same time,

With Karabiner-Elements I can change caps_lock to a hyper key to do this.

hyper key

Hold caps_lock to trigger shift + control + option + command modifier combo for various shortcuts, for example:

caps_lock + h for Google Chrome
caps_lock + j for iTerm
caps_lock + k for Visual Studio Code
caps_lock + l for Slack
caps_lock + ; for Zoom
For more examples check the rules in the JSON below with "description": "hyper-key"

Press caps_lock alone to lock / unlock caps.

How to Install

Install Karabiner-Elements
Create a JSON file ~/.config/karabiner/assets/complex_modifications/k-complex-mods.json with the JSON below
Add the Complex Modifications rules in the Karabiner-Elements Preferences

click to show JSON

{
  "title": "k-complex-mods",
  "rules": [
    {
      "description": "hyper-key",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "key_code": "caps_lock",
            "modifiers": { "optional": ["any"] }
          },
          "to": [
            {
              "key_code": "left_command",
              "modifiers": ["left_shift", "left_control", "left_option"]
            }
          ],
          "to_if_alone": [{ "key_code": "caps_lock" }]
        },
        {
          "type": "basic",
          "from": {
            "key_code": "f",
            "modifiers": {
              "mandatory": ["shift", "control", "option", "command"]
            }
          },
          "to": [
            {
              "shell_command": "open -a 'Finder'"
            }
          ]
        },
        {
          "type": "basic",
          "from": {
            "key_code": "h",
            "modifiers": {
              "mandatory": ["shift", "control", "option", "command"]
            }
          },
          "to": [
            {
              "shell_command": "open -a 'Google Chrome'"
            }
          ]
        },

        {
          "type": "basic",
          "from": {
            "key_code": "j",
            "modifiers": {
              "mandatory": ["shift", "control", "option", "command"]
            }
          },
          "to": [
            {
              "shell_command": "open -a 'iTerm'"
            }
          ]
        },
        {
          "type": "basic",
          "from": {
            "key_code": "k",
            "modifiers": {
              "mandatory": ["shift", "control", "option", "command"]
            }
          },
          "to": [
            {
              "shell_command": "open -a 'Visual Studio Code'"
            }
          ]
        },
        {
          "type": "basic",
          "from": {
            "key_code": "l",
            "modifiers": {
              "mandatory": ["shift", "control", "option", "command"]
            }
          },
          "to": [
            {
              "shell_command": "open -a 'Slack'"
            }
          ]
        },
        {
          "type": "basic",
          "from": {
            "key_code": "semicolon",
            "modifiers": {
              "mandatory": ["shift", "control", "option", "command"]
            }
          },
          "to": [
            {
              "shell_command": "open -a 'zoom.us'"
            }
          ]
        }
      ]
    }
  ]
}