If you have a Mac and want to root your Nexus 7, here is a tool that should be able to do it all.
The first option is pretty much an all in one:
Unlocks the bootloader, installs ClockWorkMod, and installs SuperSU. Just follow the instructions.
I will most likely update the tool with support for the Nexus 4 once I receive my order. This has been tested on Mac OSX Lion 10.8.2 with a stock Nexus 7 with firmware 4.1.2.
You must turn USB debugging mode on. On 4.1.2, you can enable this by going to settings, about tablet and keep tapping the Build Number at the bottom until it says you are a developer. You can then back out to settings and go to developer options and tick the USB debugging option. [Read more...]