I have a Samsung Galaxy Ace II X smartphone, and for various reasons, would like to root it. It is running android version 4.0.4. How exactly do I root it? Should I download the necessary files, or make them myself? (I have no idea how to make them). I would also like to somehow have a way to undo the rooting if necessary, and have a backup of everything on my phone now. I have heard that rooting could cause my phone to become a "brick" or be completely useless, should I be concerned about this?
Also, my computer is a mac, if that makes any difference whatsoever in the rooting process.