How to root a Samsung Galaxy S6

First you have to check if your model is supported:
http://adf.ly/1SSwnY

Then just install this APK and run it to activate the SuperSU:

       Beta 5.1: http://adf.ly/1SSxlm
       Beta    6: https://mega.nz/#!xt43HI7R

If the first APK (Beta 5.1) doesn't work, try the Beta 6.