macOS 27.2 Ships Hidden fm CLI Connecting Third-Party Models

Apple quietly shipped a lightweight agent CLI called fm in macOS 27.2 that connects to third-party model providers. Testing revealed no default system prompt, minimal built-in tools, and a hardcoded /v1 endpoint; the author speculates Apple may be paving the way for its own model services.

2026-09-20 ~ 2026-09-20 · 3 related posts

• Apple ships lightweight agent harness fm CLI in macOS 27.2, works with third-party models — gregbarbosa · 2026-09-20
• fm CLI details: no default system prompt, hardcoded /v1 endpoint blocks GLM testing — gregbarbosa · 2026-09-20
• Why third-party support in Apple's fm CLI? A bet Apple is teasing its own model service — gregbarbosa · 2026-09-20