Fix: Home Sharing on Apple TV stops working with OS X Yosemite 10.10.3 and iTunes 12

Problem: Accessing your Hackintosh’s iTunes library From Apple TV (any generation) displays an error “Cannot connect to media library [library name]” when you select the Computers icon on the Apple TV home screen. 

Solution: I can’t believe it was this simple, and I only found an old Apple forums post with this idea after spending hours turning Home Sharing on and off, signing in and out, and trying to re-install old IONetworkingFamily.kext files from previous builds– change your computer and iTunes library name, then restart Apple TV. Changing my Library name in iTunes alone did not solve the problem, so it’s possible that just changing the computer name did the trick.