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What else can I do. Both computers and Apple TV are on same Wi-Fi, iTunes account and password are the same for all three devices. home sharing turned on on all three. One library is Mary’s library. The other computer is Billy’s library. On Apple TV the only one seen is Mary’s library. Settings are all the same on both. Windows pc. The only difference is that music files on Billy’s library are mostly on an external drive. I’ve turned home sharing off. Then on. Software is all current, Wi-Fi...