I can build and run DCCpp_UNO using Xcode (with the Arduino embed extension) for a UNO board I can also build/run it using the Arduino IDE on a mega2560 I cannot compile it in Xcode for a mega2560 I get the failure ARDUINO_AVR_MEGA2560 is undefined and leads to (in Dccpp_Uno.h) #error CANNOT COMPILE - DCC++ ONLY WORKS WITH AN ARDUINO UNO OR AN ARDUINO MEGA 1280/2560 I have set up targets in the Xcode options - as I had for the Uno, but I cant find where the above option is set in dccpp_uno.h I have tried setting it (and overriding the failure) but I then get further failures setting up the main and programming pins. Does anyone use Xcode to programme Arduino?