/Library/Apple/System/Library/PrivateFrameworks/DeviceLink.framework/Versions/A/DeviceLink DeviceLink provides device-to-device wireless Bonjour connection support. The framework address incoming and outgoing sessions, device pairing, file transfer, and authorization. What this means is all the technology to connect iPhones, iPod touches and Macintosh computers (not to mention Apple TVs) together, using simple programming with all the heavy lifting done by Apple.