See my other article here [https://robpickering.com/?p=1025] for instructions on how to root the Nexus 7 under OSX in the first place.  Some of those instructions are repeated in this

I got a Nexus 7 last year and have been playing with it on and off since then.  Recently I upgraded to JellyBean 4.2.2 and it toasted my Root.  I went