
On Mac OS X and Linux add the ffx/bin directory to your path. For example, assuming ffx is unpacked into /Users/shared/ffx 
1.) BASH:
export PATH="/Users/shared/ffx/bin:$PATH"
2.) CSH:
setenv PATH "/Users/shared/ffx/bin:$PATH"

(This assumes that a Java 1.8 JRE is available)
