Different input sources for your internal and external keyboards

[FreddieAbdon]

When attempting to set different input sources for internal and external keyboards using Karabiner-Elements, I receive an error message regarding manipulators missing or being empty.

Here is the configuration I’ve trying to use:

1. Open Karabiner-Elements.
2. Go to "Complex Modifications" and add a new rule with the following JSON configuration:
   {
   "title": "Different input sources for internal and external keyboards",
   "rules": [
   {
   "description": "Switch to Spanish input source for external keyboard and English for internal keyboard",
   "manipulators": [
   {
   "type": "basic",
   "from": {
   "key_code": "vk_none"
   },
   "to": [
   {
   "select_input_source": {
   "language": "es"
   }
   }
   ],
   "conditions": [
   {
   "type": "device_if",
   "identifiers": [
   {
   "vendor_id": 1267,
   "product_id": 259
   }
   ]
   }
   ]
   },
   {
   "type": "basic",
   "from": {
   "key_code": "vk_none"
   },
   "to": [
   {
   "select_input_source": {
   "language": "en"
   }
   }
   ],
   "conditions": [
   {
   "type": "device_if",
   "identifiers": [
   {
   "vendor_id": 1452,
   "product_id": 630
   }
   ]
   }
   ]
   }
   ]
   }
   ]
   }

I have ensured that the necessary permissions are granted to Karabiner-Elements in the “Privacy & Security” settings, and the correct input sources are added in macOS. However, I am still facing this issue.

Expected Behavior:
Karabiner-Elements should switch input sources based on the keyboard being used.

Actual Behavior:
Error message: manipulators is missing or empty.

Operating system: macOS Sonoma 14.5