Abstract: A method for cross-operating systems execution of a legacy software application on a user computing device is provided. The method comprises upon launching a native application on the user computing device, executing, on a server, a cloudified application corresponding to the legacy software application, the legacy software application is compliant with a first operating system, wherein the user computing device is compliant with a second operating system, the first operating system and the second operating system are incompatible with each other; rendering outputs responsive of inputs generated by the native application and received at the cloudified application; streaming the rendered outputs to the user computing device to be displayed by the native application; and performing file system operations requested by at least one of the native application and the cloudified application on at least a cloud storage service.