Got it working. I tried reinstalling 1.6 and it seemed to install fine like before but Guru would still crash on startup. This time instead of locking up it just crashed outright. I attributed it to running a repair permissions and repair disk on both my macbook and my external drive prior to this installation. I really only got it fully working when I copied the Guru installer folder from my external, which is where I download everything to, to my macbook desktop and reinstalled from the desktop. weird huh? anyway, its working. if anyone has this problem with the latest version of Guru on the latest version of OSX that may be the problem. I was thinking maybe it had to do with me journaled case sensitive or something like that on my external drive.