Apple’s Claris subsidiary is testing an app called Harbor, which turns Apple Silicon Macs into a private AI server.
Harbor works with a single Apple Silicon Mac, but it also supports connecting multiple Mac computers via Thunderbolt 5 to pool unified memory for larger models. Apple added RDMA over Thunderbolt 5 with macOS Tahoe 26.2, making clustering faster.
Harbor detects devices connected via Thunderbolt 5 and allows users to search, download and charge open weight models. It is described as an easy-to-use application with no manual setup required.
Harbor turns your Mac into a private AI inference server. Run open models locally on Apple silicon—your data never leaves your hardware and nothing reaches the cloud. Connect multiple Mac computers via Thunderbolt 5 to pool unified memory, enabling larger models and higher concurrency than a single computer can handle alone.
Setup in minutes, not hours. Harbor automatically detects your devices via Thunderbolt 5 to form a cluster. Plug in, boot up, and go: no manual setup, no command line, no infrastructure expertise required.
Download and run models directly. Browse, download and upload open weight models from within the app. Harbor handles model management so you can focus on work, not configuration.Cluster for scale. Connect two or more Thunderbolt 5-enabled Mac computers and Harbor consolidates their unified memory into a single inference resource. Run models that exceed the capacity of any single computer or process more concurrent queries on your cluster.
Harbor is in Early Access and is not available to the public. There was a listing on the App Store, but it has now been removed.
Claris is known for its FileMaker database platform, aimed at businesses. So it’s not clear how Apple will market the Harbor app or whether it will be free. The Harbor registration page asks for a business name, which suggests more of a business orientation.
There are already some free and well-known alternatives for Mac users who want to run a local AI server. Exo is an open source tool for Mac clustering, and LM Studio is available for use on a single Mac, but Apple’s Harbor app appears to combine LM Studio’s simple interface with clustering.
Gn tech
