Apple's copyright claims over iOS simulation remain dismissed in the US.

Apple has lost its appeal against security startup Corellium, which it accused of infringing its copyrights by simulating its iOS operating system to help researchers find security flaws in Apple devices. The 11th U.S. Circuit Court of Appeals ruled that Corellium lawfully recreated Apple's system under the U.S. copyright doctrine of fair use, furthering scientific progress by aiding important security research. The court rejected Apple's arguments that Corellium simply repackaged iOS in a different format for profit, harming Apple's market for its operating system and its security-research programs.