Apple is preparing a new app called Harbor that turns your Mac into a private AI server, letting you run large language models entirely on your own machine without sending anything to the cloud.
The app, now in private preview under Apple's Claris brand, automatically detects multiple Macs over Thunderbolt 5 and links them into a cluster, so even models too big for a single machine's memory can run smoothly. Setup takes minutes, with no command line or infrastructure know-how required.
Harbor also lets you browse, download, and load open-weight AI models directly, handling all model management in the background. Privacy anchors the pitch: every byte stays on your Mac. Apple quietly pulled the App Store listing after it surfaced this week, and no public release date has been announced.