How to debug external objects

• External objects can be debugged using the XCode debugger. A guide is here (Note: I never got the debugger to work)
• The post() method can be used to print messages to the Max window (the console window in Max MSP). eg. post("test", 0);
• If the object crashes Max MSP, posting messages to the Max window could be useless. In that case, writing messages to an external text file could be of great help.