Tried transferring new songs into my iPhone just now using iTunes, but neither of my iPhone 5s and 7 Plus would show up on iTunes. Swapping cables and USB ports still doesn't work. The cables will deliver power to my phones but iTunes just won't show my device. Does anyone else have this same issue? I'm running MacOS High Sierra Public Beta 4 (17A315i) with iTunes 220.127.116.11. My iPhone 5S is running iOS 10.3.3 and my 7 Plus is running iOS 11 (15A5327g).