lib/build/darwin.json

{
  "mac": [],
  "config": {
    "mac": {
      "type": "${BUILD_TYPE}",
      "icon": "${APP_INSTALLER_ICON}",
      "target": [
        {
          "target": "dmg",
          "arch": [
            "x64"
          ]
        },
        {
          "target": "zip",
          "arch": [
            "x64"
          ]
        }
      ]
    }
  }
}