Just want to help a bit with the CM12S. Flash the attached zip if you want root in apps and ADB.
I grabbed a debuggable boot.img from the official CM servers here:
I have only tested it using TWRP, flash on your own risk.
Credits to @julian_klode:
Note: I initially wasn't aware about the source of the base zip file that I used to pack the necessary files until julian_klode mentioned it in the Q&A thread.
There is no difference between this one and his, just the fact that I update mine manually. So, I think you should follow his thread instead.