Android M: How to gain Root!

SuperSU 2.50 allows ROOT in selinux enforcing mode, so the permissive hack is not needed anymore. You need to flash one of these modified stock boot.imgs for your device: http://forum.xda-developers.com/apps/supersu/wip-android-6-0-marshmellow-t3219344

-Flash boot.img via fastboot / TWRP (unzip it and push the boot.img to your device, chose image to install - boot partition)
-Boot into recovery
-flash SuperSU
-flash latest hC: N5 and N6

This boot.img also disables security warning on bootup!

hells