System Information Recognizes iPhone, Xcode/iTunes Does Not Following the directions outlined by Apple here, i can confirm that the system itself recognizes my device, but iTunes and (more importantly) Xcode refuse to. I made sure to update everything i could; and since this is a vanilla install, I can think of no "third-party security software" that would conflict. How does one troubleshoot this?

Phone Type: iPhone 6

macOS version: 10.12.6

iOS version: 10.3.3

Full Output of system_profiler SPUSBDataType: here
This sounds like a problem with the iTunes Helper. Try reinstalling the latest version of iTunes, just in case something broke along the way.