Hi I changed the DuinOS.h file section '/* Scheduler include files. */'
from
#include "DuinOS\FreeRTOS.h"
#include "DuinOS\task.h"
to
#include "DuinOS/FreeRTOS.h"
#include "DuinOS/task.h"
To make it work on Mac OSX
Then it compiled and uploaded, now playing with it thanks Julian
Very Cool that you used FreeRTOS been meaning to play with it for some time, this is a perfect excuse..