I tried AppCode to write in objc on mac and it felt way less transparent and smooth than Xcode. Idk if Xcode is missing some features, but all my real issues probably exist in different planes. My Xcode inconvenience points are: case-insensitive completion sometimes gets in my way, as it is with single lettered variables; it is easy to break constraints for non-trivial xib. I can live with both. What is it for you, in short?