karabiner elements config for vim clutch on sierra for use with https://github.com/wwwjfy/Karabiner-Elements/releases/tag/0.90.90 . modify your ~/.config/karabiner/karabiner.json to look kinda like

karabiner.json

{
    "global": {
        "check_for_updates_on_startup": true,
        "show_in_menu_bar": true,
        "show_profile_name_in_menu_bar": false
    },
    "profiles": [
        {
            "devices": [
                {
                    "disable_built_in_keyboard_if_exists": false,
                    "identifiers": {
                        "is_keyboard": true,
                        "is_pointing_device": false,
                        "product_id": 627,
                        "vendor_id": 1452
                    },
                    "ignore": false
                }
            ],
            "fn_function_keys": {
                "f1": "display_brightness_decrement",
                "f10": "mute",
                "f11": "volume_decrement",
                "f12": "volume_increment",
                "f2": "display_brightness_increment",
                "f3": "mission_control",
                "f4": "launchpad",
                "f5": "illumination_decrement",
                "f6": "illumination_increment",
                "f7": "rewind",
                "f8": "play_or_pause",
                "f9": "fastforward"
            },
            "name": "Default profile",
            "one_to_many_mappings": {},
            "selected": true,
            "simple_modifications": {
              "caps_lock": "left_control",
              "left_option": "left_command",
              "left_command": "left_option"
            },
            "standalone_keys": {
              "caps_lock": "escape"
            },
            "virtual_hid_keyboard": {
                "caps_lock_delay_milliseconds": 0,
                "keyboard_type": "ansi",
                "standalone_keys_delay_milliseconds": 150
            }
        }
    ]
}