Claris, Apple's wholly owned subsidiary that has traditionally focused on software, is quietly turning Macs into local AI servers. According to a disclosure on November 11, its app Harbor, currently in testing, can let Macs with Apple chips run on-device large models directly, without sending sensitive data to the cloud.
One Thunderbolt 5 Cable Links Multiple Macs to Run Large Models
Harbor can run lightweight tasks on a single Apple silicon Mac, and it can also use Thunderbolt 5 connections to link multiple machines into a cluster to support larger models. This is backed by Thunderbolt 5 RDMA (Remote Direct Memory Access) support newly added in macOS Tahoe 26.2—after multiple devices are grouped together, data moves between them faster. The app automatically detects Thunderbolt 5 devices and lets users browse and download open-weight models, with no manual configuration needed at any point—effectively giving the Mac one-click local inference capability.
Briefly Listed, Then Pulled, Still in Early Access
Harbor is currently still in an early-access stage and is not open to the public. It briefly appeared on the App Store, but its page has now been taken down. At a time when cloud AI costs are high and privacy concerns are rising, Apple is turning its own hardware into a modular local compute pool. This is both a bet on the on-device approach and a sign that it does not want to hand the AI entry point entirely over to third-party clouds. For users, this means an idle Mac in the office could be transformed into an energy-efficient, offline private compute box.
