Thanks both for being there. I just wanted to add, I'm no newbie when it comes to compile, install an OS, or code, but sometimes the _force_ is not with one. Case in point, my Virtualbox crashed when almost finishing my Debian installation complaining about insufficient memory...I've 8GB and only Chrome open, and the latest Vbox version! I never saw that before and I've setup my share of virtual machines!
Maybe I'll have to reconsider homebrew...or simply give up if there is no other way of having kwant accept the the lapack libs that came with my Xcode copy. Speaking of that, might the problem be that my lapack copy is too old a version? My mac is from 2009 and I downloaded that Xcode in 2010. Could find out the precise version if that helps clarifying things.