Where is Servo.h on mac os x

Hi there
As advised here how can i change the frequency of servo library? - Programming Questions - Arduino Forum to change REFRESH_INTERVAL of Servo.h, I'm looking for it on mac os x 10.7.5 but I can't find it!
Please help ...

In IDE 1.6.5r3 it is in:

file:///Applications/Arduino.app/Contents/Java/libraries/Servo/src/Servo.h

Control-click on the Arduino app and select "Show Package Contents" to see the contents (applications are a special kind of folder).