Apple is working on a new Mac app called Harbor that turns one or more Mac computers into a private artificial intelligence server, according to reports published on 10 November 2026. The app is said to run open-weight AI models locally on Apple silicon, so user data never leaves the hardware and nothing is sent to the cloud.

The app was uncovered by leaker Aaron Perris, whose findings were reported by 9to5Mac and AppleInsider. Apple has not officially announced Harbor, and no release date or pricing has been confirmed. According to the reports, Harbor is currently in a private preview under Apple's Claris brand.

Macs linked over Thunderbolt 5

Harbor is designed to remove the setup work that usually comes with running large language models at home or in a small office. The app automatically detects connected devices over Thunderbolt 5 and forms a cluster, pooling the unified memory of two or more Thunderbolt 5-capable Macs into a single inference resource. That would allow larger models to run, or more requests to be served at once, than a single computer could manage alone.

Users can browse, download and load open-weight models from within the app, with Harbor handling model management itself. The leaked description promises setup in minutes rather than hours, with no manual configuration, no command line and no infrastructure expertise required. AppleInsider reports the app was formerly known as Fabric.

Local AI without the cloud

The idea taps into growing interest in running AI models on personal hardware. Mac computers, particularly Mac Studio and Mac mini, have become popular for local AI work because of their large unified memory, and Apple has already added Thunderbolt networking support to its MLX machine-learning framework. Harbor appears aimed at making that kind of setup accessible to people who do not want to send their data to cloud services or manage servers by hand.

For now, Harbor remains unreleased and in private preview, and 9to5Mac notes that a public launch seems likely in the weeks and months ahead, while AppleInsider cautions that end users should not expect to see the app anytime soon. Until Apple confirms the details, the app's exact features, supported models and availability remain unconfirmed.