Apple is developing a new Mac app called "Harbor" that allows users to easily run local AI models on their devices, effectively turning their Mac into a private AI inference server. The app, discovered by leaker Aaron Perris, enables users to run open-source models locally on Apple silicon, keeping their data private and off the cloud. Additionally, Harbor allows users to connect multiple Macs via Thunderbolt 5, pooling their resources to enhance AI model performance, making it an attractive tool for those using Macs for AI-related tasks, such as Mac Studio and Mac mini users.