karabiner.json

{
    "global": { "show_in_menu_bar": false },
    "profiles": [
        {
            "complex_modifications": {
                "rules": [
                    {
                        "description": "Change caps_lock to control if pressed with other keys, to escape if pressed alone.",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "caps_lock",
                                    "modifiers": { "optional": ["any"] }
                                },
                                "to": [{ "key_code": "left_control" }],
                                "to_if_alone": [{ "key_code": "escape" }],
                                "type": "basic"
                            }
                        ]
                    }
                ]
            },
            "fn_function_keys": [
                {
                    "from": { "key_code": "f3" },
                    "to": [{ "key_code": "mission_control" }]
                },
                {
                    "from": { "key_code": "f4" },
                    "to": [{ "key_code": "launchpad" }]
                },
                {
                    "from": { "key_code": "f5" },
                    "to": [{ "key_code": "illumination_decrement" }]
                },
                {
                    "from": { "key_code": "f6" },
                    "to": [{ "key_code": "illumination_increment" }]
                },
                {
                    "from": { "key_code": "f9" },
                    "to": [{ "consumer_key_code": "fastforward" }]
                }
            ],
            "name": "Default profile",
            "selected": true,
            "virtual_hid_keyboard": {
                "country_code": 0,
                "keyboard_type_v2": "ansi"
            }
        }
    ]
}