A US court has ruled that Corellium's virtual iOS devices are allowed and that Apple cannot stop them. Corellium provides virtual iOS devices for security research purposes, and the court found that this use is protected by copyright law's fair use doctrine. Apple had been trying to ban these virtual devices, but the court's decision upholds a previous ruling from 2020. The ruling may have implications for Apple's control over its ecosystem and the ability of security researchers to test iOS devices.