The skies are darkening over the “walled garden” of Apple’s operating system. A Northern District of California court cleared the way for antitrust claims against Apple over its iCloud storage service on mobile devices. The court’s decision to deny Apple’s motion to dismiss in Gamboa v. Apple is a wake-up call for tech companies: courts are ready and willing to scrutinize platform-based restrictions, especially when those barriers are baked into product design. Judge Eumi Lee’s ruling also shows how a change in legal strategy can make all the difference for plaintiffs – or defendants – when charting a course through the early stages of antitrust litigation.