When Apple filed its lawsuit on June 24 in Santa Clara County Superior Court, it painted a picture of a senior design engineer quietly siphoning off the crown jewels of its nascent augmented‑reality ambitions. The complaint alleges that Di Liu, who spent seven years at Apple working on the Vision Pro headset, downloaded thousands of documents containing proprietary design details, hardware test results, supply‑chain plans, and even unreleased feature specifications, then slipped them into his personal cloud storage. All this, Apple claims, happened in the final days before Liu tendered his resignation—ostensibly for health reasons—only to join Snap’s product design team shortly thereafter.

Apple’s standard offboarding protocol calls for instant revocation of network and system access when employees announce moves to competitors. According to the lawsuit (PDF version), Liu sidestepped that safeguard by telling Apple he was leaving to focus on family and health, rather than disclosing his new position at Snap. With his Apple‑issued MacBook still fully hooked into the company’s internal systems, Liu allegedly copied a “massive volume” of folders—manually selecting, renaming, and reorganizing them before uploading to his private account, then deleting local copies to cover his tracks.

Forensic analysis of Liu’s company laptop forms the backbone of Apple’s claims. Log data reviewed by Apple’s security team reportedly shows that Liu didn’t simply snag a bulk archive; he cherry‑picked specific folders, renaming them in some cases to disguise their origins, then emptied the Trash to eliminate traces of the transfer. Apple’s engineers even discovered intentional deletion patterns timed to occur after the uploads, suggesting a covert, premeditated effort to smuggle out confidential files.

Why would a handful of design blueprints and testing reports matter so much? In the last year, Snap has quietly shifted its focus from camera‑laden sunglasses to full‑blown AR hardware—an arena where the Vision Pro is broadly viewed as the gold standard. Apple alleges that the overlap between the materials Liu took and the competencies Snap is building into its next‑gen Spectacles “suggests that Mr. Liu intends to use Apple’s Proprietary Information at Snap.” While Snap is not named in the lawsuit, the timing and nature of Liu’s new role raise obvious questions about where those trade secrets might end up.

Snap, for its part, has pushed back. In a brief statement provided to SiliconValley.com, the company said it reviewed Apple’s claims and “has no reason to believe they are related to this individual’s employment or conduct at Snap.” But legal experts say that even unintentional incorporation of stolen IP—say, leveraging a design nuance or calibration technique learned at Apple—can expose a company to costly injunctions and damage awards. In high‑stakes hardware development, the line between “inspired by” and “stolen from” can be razor‑thin.