“The government has utterly failed to demonstrate that the requested order is necessary to effectuate the search warrant, including that it exhausted all other avenues for recovering the information it seeks,’’ Apple argued in the new filing to U.S. District Judge Margo Brodie. “Before the government demands that Apple do the work of law enforcement, the government must offer evidence that it has performed an ‘exhaustive search’ and that it remains unable to obtain the data it seeks without Apple’s assistance.”