1. 安装 Karabiner

Karabiner - Software for macOS

2.输入法设置成 德沃夏克 和 简体拼音

3. Karabiner 将 Capslocks 替换成 left_control

4. 设置shift单独按时切换输入法

{
  "title": "Change caps_lock key",
  "rules": [
    {
      "description": "Post left_shift if caps_loc is pressed alone.",
      "manipulators": [
        {
          "type": "basic",
          "from": { "key_code": "left_shift", "modifiers": { "optional": [ "any" ] } },
          "to": [ { "key_code": "left_shift" } ],
          "to_if_alone": [ { "key_code": "caps_lock" } ] } ]
    }
  ]
}

参考

karabiner.json Reference Manual - Karabiner - Software for macOS