I got asked how I made the testing rig for my recent experiments with Apple’s on-device LLM.

Instead of explaining, I made an app you can download for macOS Tahoe that lets you test your own prompts.

https://natbuckley.co.uk/2025/07/02/i-made-a-macos-app-that-lets-you-play-with-the-on-device-llm/