Well, __builtin_trap works, but how do you step past it, like you could the Debugger() call? My current workaround is: #pragma mark - Debugging void LineSolver::PreciseDebug(vector<unsigned char> &lineFromBoard) { if((myType == COL_SOLVER) && (myIndex == 9)){ callCount++; if(callCount >= 1){ cout << DumpColorLine(lineFromBoard, true) << endl << endl; } } } I just set a breakpoint in there.

This seems to work, but the applicationShouldOpenUntitledFile method never seems to get called: // Let's not open default window just because we're being brought to the front. -(BOOL)applicationShouldHandleReopen:(NSApplication *)sender hasVisibleWindows:(BOOL)hasVisibleWindows { return NO; } -(BOOL)applicationShouldOpenUntitledFile:(NSApplication *)sender { return NO; }