macOS 27 has an AI model in Terminal: what the fm command does, and what Apple doesn't say

Apple's new Mac update ships a command called fm that talks to its on-device language model. No account, no API key, no install. I read Apple's own… Aliteq Glitch · Gadgets & Creators Editor

Yes, macOS 27 ships a built-in language model you can use from Terminal. Apple's WWDC26 session says a new command, fm, comes pre-installed from macOS 27. You type fm respond with a prompt, or fm…

What it is: a pre-installed command with respond, chat and schema, plus a separate Python package

Default model: on-device, always available; the bigger cloud model has a 32,000-token context window and usage limits

Which Macs: the ones that run macOS 27, from Apple silicon 2020 models up to MacBook Neo

Not published: the on-device context window and any benchmark; this page makes no speed claims

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