> On Oct 28, 2014, at 3:13 AM, Jonathan Taylor <jonathan.tay...@glasgow.ac.uk> > wrote: > > If Xcode is running, printf goes to the Xcode console. If my program is > launched from the OS X console, printf will go there. My memory is that if > neither of these conditions are met then the output will go to the Console > Log as per NSLog. That doesn't seem to be the case any more.
stderr gets logged to ASL and can be displayed in Console.app. I don't think stdout ever went anywhere in particular in an app launched via the GUI … it's always just been dropped on the floor. I basically never use printf for logging in any code that might end up in a GUI app, I use fprintf(stderr, …) instead. —Jens
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