Apple Tests Harbor App to Turn Macs into Local AI Servers

Apple's subsidiary Claris is testing an app called Harbor. It can turn Apple silicon Macs into local AI servers, letting users run AI models right on their devices.

Harbor can run on a single Mac, or link multiple Macs through Thunderbolt 5 to run bigger AI models. Apple has added Thunderbolt 5 RDMA support in macOS Tahoe 26.2, which makes data move faster between devices in a cluster.

The app can spot Thunderbolt 5 devices on its own and lets users browse and download open-weight models without any manual setup. For now, Harbor is still in early testing and not open to the public. It once showed up in the App Store, but that page has been taken down.