My 2nd gen ipod shuffle will plug plug into the dock via a wall charger and will charge and play music. when I plug it in to my mac to edit playlist I get a quick green blink that turns to a quick orange blink, then the light goes off. It is not showing up in the device list in itunes. itunes 12.4.1.6 mac os x yosemite 10.10.5
iPod shuffle, OS X Yosemite (10.10.5)