These instructions compile a native OS X version of libnfc that lives in your home directory, and which cannot be moved around, but should always be discoverable by applications.
Assumes OS X with Xcode or Xcode command-line tools, not macports or homebrew
To install Xcode command-line tools in recent versions of OS X, open Terminal, type xcode-select --install
and click "Install"
Older versions of OS X may need to manually download disk images of older versions of Xcode and/or the Xcode command-line tools, as various certificates may have expired (e.g. 10.7.4 requires a manual install from the Xcode 4.6.2 command-line tools image)
Download latest pkg-config (tested with 0.29.1) from https://pkg-config.freedesktop.org/releases/?C=M;O=D