I have a problem with running 32 bit assembly on my 64 bit mac running os x 10.9.5. I also have NASM 2.11.08 installed. I am currently reading Assembly Language Step by Step
An executable for Linux won't run on a Mac, period. Install Linux on a virtual machine on your Mac, if you want to run Jeff Duntemann's stuff. The code can be translated to -f macho64
fairly(?) easily, but there's a bad bug in Nasm-2.11.08 on -f macho64
:(
There's a release candidate - http://www.nasm.us/pub/nasm/releasebuilds/2.11.09rc1/macosx/ - which "may" fix it. Someone needs to test it. Perhaps not a good job for a beginner. You should be able to program using gcc with your Mac, but not using "Step by Step". Nasm will work on your Mac... but not right now... Install Linux if you can, for now.