For starters, unless you are somehow running Mac OSX on an ARM processor, you shouldn't be using the ARM compiler (the ARM compiler is for ML, b/c the camera's processor is ARM, but mlv_dump is a computer utility, you need to use the compiler for your computer's architecture). If you have xcode installed with command line tools, you should have a standard version of gcc and also llvm (not sure which versions of those, don't have my mac with me right now). You probably need to modify the makefile to point at the correct compiler for your computer. You might also have to find and download an appropriate version.