macOS 27 ships an `fm` CLI preinstalled, putting Apple's on-device Foundation Model one terminal command away

Apple Developer (via r/LocalLLaMA, 203 upvotes)·medium signalXBlueskyLinkedInCopy link

r/LocalLLaMA discovered (203 upvotes, 68 comments) that macOS 27 preinstalls a command-line tool `fm` exposing Apple Foundation Models with no install step: `fm chat` opens an interactive session with `/model` to switch to the Private Cloud Compute model and `/save` to persist a conversation, alongside `fm respond` for single turns and `fm schema` for structured output. Apple documented it at WWDC26 session 334 along with a Foundation Models Python SDK. The thread's reaction was mostly derisive about the model's quality, with top comments posting strawberry-counting failures, so the news is distribution, not capability.