I want to use this library but I am not sure where to put it on a mac.
libraries go in the libraries sub-directory of your Arduino sketchbook folder (~/Documents/Arduino). You'll need to create the libraries/ directory. This way, libraries can stick around when you upgrade the version of Arduino.
libraries go in the libraries sub-directory of your Arduino sketchbook folder (~/Documents/Arduino)
That's only with the latest (0017) version of the IDE.
For previous versions, libraries go in /Applications/arduino-0016/hardware/libraries/
-j
thanks