Thunderbolt, next to the USB: I switch between a FireWire 800 drive and an Ethernet cable, connected with Apple's FireWire and Ethernet adapters. They no longer appear in apps like iTunes or iPhoto, and Xcode and Android Studio can't connect to them. When the problem occurs, the phones and tablets still receive power through USB, but can no longer sync with the computer. I've tried two different hubs and two different cables going to the hub, but that hasn't helped. Left-side USB: I have 2-4 tablets and phones connected through a powered hub. At seemingly random times, but at least once a day, the ports become nonfunctional and I have to restart the computer to use them again. I got a new mid-2014 Retina MacBook Pro about a month ago, and am running into a problem with the Thunderbolt and USB ports.
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