Chainfire keeps chipping away at SuperSU. Before long it will be perfect, working flawlessly across devices. The latest update brings SuperSU to version 2.64. The major change is with the zip installer. It will now try and detect 6.0 firmwares that are rootable without doing a systemless install. This means that the root will modify the system only and not the boot image. The root will install into /systme unless you override. Grab SuperSU 2.64 here!