How to sniff iPhone web traffic with Wireshark

Open Xcode and click on top Devices like in the image below:

Devices from Xcode

Copy the identifier (in the black row):

Identifier iPhone from Xcode

Now open the terminal and paste:

rvictl -s idcopyed

If it show:

Starting device identifiercopiato [SUCCEEDED] with interface rvi0

Open Wireshark and start sniffing from rvi0. Voilà!

How to delete cache and free space on Xcode

If something goes wrong or the simple Clean and rebuild does not work, you must delete the contents of these folders right now (carefully).

~/Library/Developer/Xcode/DerivedData
~/Library/Developer/Xcode/Archives
~/Library/Developer/Xcode/iOS DeviceSupport
~/Library/Developer/CoreSimulator
~/Library/Caches/com.apple.dt.Xcode
~/Library/Application Support/MobileSync/Backup

Thanks to the source.