Apple Sues OpenAI Over Engineer's Secret Access to Internal Servers

Apple filed a lawsuit against OpenAI on Friday, alleging that a former iPhone engineer named Chang Liu took proprietary information with him when he left to join OpenAI's hardware division. The case centers on three specific accusations: Liu kept a company-issued MacBook he never returned, maintained a back-channel relationship with a current Apple employee who continued feeding him internal information, and exploited a software bug that gave him persistent, unauthorized access to Apple's internal file servers.

The 'LOL moment' referenced in the case apparently relates to Liu's reaction upon discovering the software vulnerability — a bug that, rather than being reported to Apple's security team, was quietly leveraged for ongoing access to sensitive company data. The combination of an unreturned device, an inside source, and a technical exploit paints a picture Apple is using to argue systematic, deliberate trade secret theft rather than inadvertent knowledge transfer.

The lawsuit lands at a particularly charged moment in the Apple-OpenAI relationship. The two companies have had a visible partnership — Sam Altman and Tim Cook appeared together at a White House dinner in 2025 — while simultaneously competing in the AI hardware and software space. OpenAI's hardware division, which Liu joined, is seen as a direct threat to Apple's device ecosystem, making the alleged theft of internal engineering knowledge especially consequential.

The case could set a significant legal precedent for how courts treat employee mobility between tech rivals, particularly when departing engineers carry institutional knowledge of unreported bugs and security vulnerabilities. Apple's decision to go public with a full lawsuit rather than pursue quiet settlement signals the company views the alleged conduct as serious enough to warrant a high-profile legal fight.