Something tells me you're on OS X, and like myself, you'll find you mostly want everything replaced with GNU binaries: $ brew install gnu-units $ gunits A

Something tells me you're on OS X, and like myself, you'll find you mostly want everything replaced with GNU binaries: $ brew install gnu-units $ gunits Also see: https://apple.stackexchange.com/questions/69223/how-to-replace-mac-os-x-utilities-with-gnu-core-utilities https://apple.stackexchange.com/questions/69223/how-to-repla...