Disable WiFi debug in the device window. Hanging will become rare. However, sometimes it appears anyway. Just unplug the test device from the cable and plug it back in. This error is somewhere in connection with the device for debugging.

sudo arch -x86_64 gem install ffi Then arch -x86_64 pod install

sudo arch -x86_64 gem install ffi Then arch -x86_64 pod install UPD. One underline between x86 and 64. This forum need to enter two, but show one only.